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Polished Lab Grown Diamonds

“Discover our exquisite collection of loose polished lab-grown diamonds, available in all shapes and sizes to suit your unique needs. Ethically crafted and brilliantly cut, our diamonds offer beauty with a conscience.”

Professional Brilliant Round Cut Diamond Carat MM Conversion

MM to CT Round Cut Size Comparison Tool

Brilliant Round Cut Diamond Carat MM
0.21 – 5.20 cts
ROUND CUT CARAT WEIGHTROUND CUT MM SIZE
0.21 – 0.22 ct3.80 – 3.90mm
0.23 – 0.24 ct3.90 – 4.00mm
0.25 – 0.26 ct4.00 – 4.10mm
0.26 – 0.27 ct4.10 – 4.20mm
0.27- 0.28 ct4.20 – 4.30 mm
0.30 -0.36 ct4.40 – 4.50 mm
0.40 – 0.45 ct4.60 – 4.70 mm
0.46 – 0.48 ct4.90 – 5.00 mm
0.50 – 0.57 ct5.10 – 5.30 mm
0.60 – 0.67 ct5.40 – 5.60 mm
0.70 – 0.77 ct5.70 – 5.90 mm
0.80 – 0.85 ct6.00 – 6.10 mm
0.90 – 0.95 ct6.20 – 6.30 mm
1.00 – 1.10 ct6.40 – 6.60 mm
1.22 – 1.26 ct6.70 – 6.80 mm
1.28 – 1.30 ct6.90 – 7.10 mm
1.50 – 1.55 ct7.20 – 7.40 mm
1.67 – 1.80 ct7.50 – 7.90 mm
2.00 – 2.10 ct8.10 – 8.30 mm
2.40 – 2.60 ct8.50 – 8.80 mm
2.70 – 2.80 ct8.90 – 9.10 mm
3.00 – 3.10 ct9.20 – 9.40 mm
3.30 – 3.40 ct9.50 – 9.60 mm
3.50 – 3.70 ct6.70 – 7.80 mm
3.80 – 3.90 ct9.90 – 10.00 mm
4.00 – 4.10 ct10.10 – 10.20 mm
3.30 – 4.40 ct10.30 – 10.50 mm
4.50 – 4.60 ct10.60 – 10.70 mm
4.70 – 4.80 ct10.80 – 10.90 mm
4.90 – 4.99 ct10.90 – 11.00 mm
5.00 – 5.20 ct11.10 – 11.20 mm
New Era Diamonds Contact us for any specific size requirement
Round Cut Melee Diamond Conversion of CT MM / MM to Carat And Sieve Size Chart
0.005 – 0.20 cts​
ROUND CUT CARAT WEIGHTROUND CUT MM SIZECTS/PCSROUND CUT SIEVE SIZES
0.005 ct0.90-1.10 mm1/200+000/-0
0.006 ct1.10-1.15 mm1/175+0/-1
0.007 ct1.15-1.20 mm1/150+1/-1.5
0.008 ct1.20-1.25 mm1/120+1.5/-2
0.009 ct1.25-1.30 mm1/100+2/-2.5
0.01 ct130-1.35 mm1/100+2.5/-3
0.011 ct1.35-1.40 mm1/100+3/-3.5
0.012 ct1.40-1.45 mm1/80+3.5/-4
0.013 ct1.45-1.50 mm1/80+4/-4.5
0.014 ct1.50-1.55 mm1/70+4.5/-5
0.016 ct1.55-1.60 mm1/60+5/-5.5
0.018 ct1.60-1.70 mm1/50+5.5/-6
0.021 ct1.70-1.80 mm1/50+6/-6.5
0.025 ct1.80-1.90 mm1/40+6.5/-7
0.029 ct1.90-2.00 mm1/30+7/-7.5
0.035 ct2.00-2.10 mm1/30+7.5/-8
0.039 ct2.10-2.20 mm1/25+8/-8.5
0.044 ct2.20-2.30 mm1/25+8.5/-9
0.052 ct2.30-2.40 mm1/20+9/-9.5
0.058 ct2.40-2.50 mm1/20+9.5/-10
0.069 ct2.50-2.60 mm1/15+10/-10.5
0.074 ct2.60-2.70 mm1/15+10.5/-11
0.078 ct2.70-2.80 mm1/12+11/-11.5
0.086 ct2.80-2.90 mm1/12+11.5/-12
0.095 ct2.90-3.00 mm1/10+12/-12.5
0.108 ct3.00-3.10 mm1/10+12.5/-13
0.116 ct3.10-3.20 mm1/8+13/-13.5
0.13 ct3.20-3.30 mm1/8+13.5/-14
0.145 ct3.30-3.40 mm1/6+14/-14.5
0.155 ct3.40-3.50 mm1/6+14.5/-15
0.165 ct3.50-3.60 mm1/6+15/-15.5
0.19 ct3.60-3.70 mm1/5+15.5/-15.75
0.20 ct3.70-3.80 mm1/5+15.75/-16.5
NGD Diamonds Contact us for any specific size requirement

What is the Ideal Table and Depth for the Brilliant Round Cut Diamond?
 EXCELLENTVERY GOODGOOD
Table – %53% – 58%52% – 53%
or
58% – 60%		51%
or
61% – 64%
Depth – %59% – 62.3%58% – 58.9%
or
62.4% – 63.5%		57.5% – 57.9%
or
63.6% – 64.1%
Crown Angle34 – 34.932.1 – 33.9
or
35 – 35.9		30.1 – 32
or
36 – 37.9
Pavilion Depth – %42.8% – 43.2%42% – 42.7%
or
43.3% – 43.9%		41% – 41.9%
or
44% – 45.5%
Girdle ThicknessThinVery ThinVery Thin
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio0.99 – 1.010.98 – 1.01

Professional Princess Diamond Size Chart

Detailed Carat to MM / MM to Carat Princess Cut Diamond Size Chart

Princess Cut Diamond MM Size Chart / CT Conversion Chart
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0,11 ct.2.50 – 2.60 mm.
0.12 – 0.13 ct.2.70 – 2.80 mm.
0.14 – 0.17 ct.2.90 – 3.00 mm.
0.18 – 0.21 ct.3.10 – 3.20 mm.
0.22 – 0.24 ct.3.30 – 3.40 mm.
0.25 – 0.28 ct.3.50 – 3.60 mm.
0.30 – 0.35 ct.3.70 – 3.80 mm.
0.35 – 0.40 ct.3.90 – 4.00 mm.
0.40 – 0.45 ct.4.10 – 4.20 mm.
0.45 – 0.50 ct.4.30 – 4.40 mm.
0.55 – 0.60 ct.4.50 – 4.60 mm.
0.60 – 0.65 ct.4.70 – 4.80 mm.
0.70 – 0.75 ct.4.90 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.80 – 0.89 ct.5.10 – 5.30 mm.
0.90 – 0.98 ct.5.30 – 5.50 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.40 – 5.90 mm.
1.30 – 1.45 ct5.80 – 6.40 mm.
1.50 – 1.60 ct6.00 – 6.70 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.80 – 7.50 mm.
2.40 – 2.60 ct7.20 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.10 mm.
3.00 – 3.30 ct7.70 – 8.50 mm.
3.40 – 3.60 ct8.20 – 8.60 mm.
3.70 -3.90 ct8.30 – 8.70 mm.
4.00 – 4.20 ct8.40 – 9.10 mm.
4.40 – 4.70 ct9.00 – 9.60 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Princess Cut?
 EXCELLENTVERY GOODGOOD
Table – %67% – 72%

59% – 66%

or

73% – 75%

59% – 66%

or

73% – 75%

Depth – %64%75%

58% –

or

75.1% – 80%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio1.00 – 1.031.04 – 1.05

Professional Square Cushion Cut Diamond Size Chart

Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool

Cushion Cut MM to Carat Diamond Conversion Charts0.04 – 0.69 cts & 0.70 – 5.25 cts
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.11 -0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.80 – 3.90 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.20 – 4.40 mm.
0.50 – 0.55 ct.4.40 – 4.60 mm.
0.56 – 0.58 ct.4.60 – 4.80 mm.
0.60 – 0.69 ct.4.80 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.70 – 0.77 ct.5.00 – 5.20 mm.
0.80 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.50 mm.
1.30 – 1.45 ct6.10 – 6.90 mm.
1.50 – 1.60 ct6.40 – 7.10 mm.
1.65 – 1.80 ct6.60 – 7.30 mm.
2.00 – 2.30 ct7.00 – 7.80 mm.
2.40 – 2.60 ct7.70 – 8.30 mm.
2.70 – 2.90 ct8.00 – 8.50 mm.
3.00 – 3.30 ct8.10 – 8.70 mm.
3.40 – 3.60 ct8.40 – 8.90 mm.
3.70 -3.90 ct8.70 – 9.20 mm.
4.00 – 4.20 ct9.00 – 9.60 mm.
4.40 – 4.70 ct9.40 – 9.70 mm.
5.00 – 5.25 ct9.80 – 10.50 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Square Cushion Cut?
 EXCELLENTVERY GOODGOOD
Table – %61 %- 67%

58% – 60%

or

65% – 70%

56% – 57%

or

70% – 71%

Depth – %61% – 67%

58% – 60.9%

or

67.1% – 70%

56% – 57.9%

or

70.1% – 71%

Girdle Very ThinSlightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio1.00 – 1.031.04 – 1.05

Professional Square Cushion Cut Diamond Size Chart

Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool

Cushion Cut MM to Carat Diamond Conversion Charts
0.04 – 0.69 cts & 0.70 – 5.25 cts
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.11 -0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.80 – 3.90 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.20 – 4.40 mm.
0.50 – 0.55 ct.4.40 – 4.60 mm.
0.56 – 0.58 ct.4.60 – 4.80 mm.
0.60 – 0.69 ct.4.80 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.70 – 0.77 ct.5.00 – 5.20 mm.
0.80 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.50 mm.
1.30 – 1.45 ct6.10 – 6.90 mm.
1.50 – 1.60 ct6.40 – 7.10 mm.
1.65 – 1.80 ct6.60 – 7.30 mm.
2.00 – 2.30 ct7.00 – 7.80 mm.
2.40 – 2.60 ct7.70 – 8.30 mm.
2.70 – 2.90 ct8.00 – 8.50 mm.
3.00 – 3.30 ct8.10 – 8.70 mm.
3.40 – 3.60 ct8.40 – 8.90 mm.
3.70 -3.90 ct8.70 – 9.20 mm.
4.00 – 4.20 ct9.00 – 9.60 mm.
4.40 – 4.70 ct9.40 – 9.70 mm.
5.00 – 5.25 ct9.80 – 10.50 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Square Cushion Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 59.9%

or

70.1% – 74%

54% – 56.9%

or

74.1% – 78%

Girdle Very Thin toSlightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.20-1.30

1.15 – 1.25

or

1.29 – 1.35

1.10 – 1.15

or

1.36 – 1.40

Professional Oval Diamond Size Chart

Detailed Oval Cut Size Comparison From CT to MM / MM to CT by Gemologists

Oval Cut Diamond Conversion Tool From CT to MM / MM to CT
0.04 – 1.15 cts. & 1.20 to 1.15
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
0.04 – 0.07 ct2.50 – 3.40 mm.2.00 – 2.40 mm.
0.08 – 0.12 ct3.40 – 4.80 mm.2.40 – 3.00 mm.
0.13 – 0.17 ct3.90 – 4.40 mm.2.80 -3.10 mm.
0.18 – 0.22 ct4.10 – 4.60 mm.3.00 – 3.40 mm.
0.23 – 0.28 ct4.50 – 5.10 mm.3.30 – 3.60 mm.
0.30 – 0.37 ct4.90 – 5.60 mm.3.60 – 4.00 mm.
0.40 – 0.48 ct5.60 – 6.00 mm.4.00 – 4.40 mm.
0.50 – 0.58 ct5.90 – 6.30 mm.4.40 – 4.60 mm.
0.60 – 0.69 ct6.30 – 6.70 mm.4.60 – 4.80 mm.
0.70 -0.78 ct6.60 – 6.80 mm.4.80 – 5.20 mm.
0.80 – 0.88 ct6.90 – 7.30 mm.5.10 – 5.40 mm.
0.90 – 0.98 ct7.20 – 7.80 mm.5.20 – 5.50 mm.
1.00 – 1.15 ct7.90 – 8.20 mm.5.50 – 5.80 mm.
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
1.20 – 1.27 ct8.10 -8.30 mm.6.00 – 6.10 mm.
1.30 – 1.45 ct8.40 – 8.50 mm.6.00 – 6.20 mm.
1.50 – 1.60 ct8.50 – 8.80 mm.6.20 -6.40 mm.
1.65 – 1.80 ct8.90 – 9.60 mm.6.60 – 6.80 mm.
2.00 – 2.30 ct9.80 – 10.10 mm.7.10 – 7.30 mm.
2.40 – 2.60 ct10.30 -10.70 mm.7.50 – 7.80 mm.
2.70 – 2.90 ct10.70 – 11.00 mm.7.80 – 7.90 mm.
3.00 – 3.30 ct10.90 – 11.60 mm.8.00 – 8.40mm.
3.40 – 3.60 ct11.50 – 12.00 mm.8.40 – 8.70 mm.
3.70 -3.90 ct12.00 – 12.35 mm.8.80 – 8.90 mm.
4.00 – 4.20 ct12.25 – 12.50 mm.8.80 – 9.00 mm.
4.40 – 4.70 ct12.40 – 13.00 mm.9.00 – 9.30 mm.
5.00 – 5.25 ct13.00 – 13.60 mm.9.40 – 9.70 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Oval Cut?
Oval Cut Diamond Recommended Proportions Guide
 EXCELLENTVERY GOODGOOD
Table – %67% – 72%

59% – 66%

or

73% – 75%

59% – 66%

or

73% – 75%

Depth – %64%75%

58% – 63.9%

or

75.1% – 80%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 – 1.03

1.30 – 1.34

or

1.51 – 1.55

1.25 – 1.29

or

1.56 – 1.60

Professional Pear Shape Diamond Size Chart & Conversion Tool

Pear Cut Diamond Size Comparison Tool – CT to MM / MM to CT

0.4 – 1.15 cts & 1.10 – 5.25 cts
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
0.04 – 0.07 ct.3.30 – 3.70 mm.2.00 – 2.40 mm.
0.08 – 0.12 ct.3.60 – 4.20 mm.2.40 – 2.80 mm.
0.13 – 0.17 ct.4.10 – 4.80 mm.2.90 – 3.20 mm.
0.18 – 0.22 ct.4.70 – 5.20 mm.3.10 – 3.30 mm.
0.23 – 0.28 ct.5.10 – 5.80 mm.3.40 – 2.70 mm.
0.30 – 0.37 ct.5.70 – 6.10 mm.3.60 – 4.00 mm.
0.40 – 0.48 ct.6.10 – 6.60 mm.3.90 – 4.40 mm.
0.50 – 0.59 ct.6.50 – 7.30 mm.4.30 – 4.60 mm.
0.60 – 0.67 ct.6.80 – 7.40 mm.4.60 – 4.80 mm.
0.70 – 0.78 ct.7.30 – 8.00 mm.4.80 – 5.00 mm.
0.80 – 0.88 ct.8.00 – 8.40 mm.5.10 – 5.30 mm.
0.90 – 0.98 ct.8.20 – 8.50 mm.5.30 – 5.50 mm.
1.00 -1.15 ct.8.40 – 8.90 mm.5.60 – 5.80 mm.
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
1.20 – 1.27 ct9.00 – 9.50 mm.5.90 – 6.00 mm.
1.30 – 1.45 ct9.30 – 9.60 mm.6.10 – 6.20 mm.
1.50 – 1.60 ct9.70 – 10.20 mm.6.30 – 6.50 mm.
1.65 – 1.80 ct10.00 – 10.50 mm.6.50 – 6.70 mm.
2.00 – 2.30 ct10.70 – 11.50 mm.7.00 – 7.30 mm.
2.40 – 2.60 ct11.50 – 11.80 mm.7.40 – 7.70 mm.
2.70 – 2.90 ct11.70 – 12.30 mm.7.70 – 7.80 mm.
3.00 – 3.30 ct12.40 – 13.00 mm.8.00 – 8.20 mm.
3.40 – 3.60 ct12.70 – 13.40 mm.8.30 – 8.50 mm.
3.70 -3.90 ct13.30 – 13.70 mm.8.50 – 8.70 mm.
4.00 – 4.20 ct13.60 – 14.00 mm.8.70 – 8.90 mm.
4.40 – 4.70 ct14.00 – 14.30 mm.9.00 – 9.20 mm.
5.00 – 5.25 ct14.50 – 15.50 mm.9.30 – 9.70 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Pear Cut?
Recommended Proportions Guide
 EXCELLENTVERY GOODGOOD
Table – %53% – 63%

52% – 64%

or

64% – 65%

51%

or

66% – 68%

Depth – %58% – 62%

56% – 57.9%

or

62.1% – 66%

53% – 55.9%

or

66.1% – 71%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Pear Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.45 – 1.55

1.40 – 1.45

or

1.56 – 1.65

1.35 – 1.39

or

1.66 – 1.80

Professional Emerald Cut Diamond Size Chart

Emerald Shaped Diamond Size Comparison From CT to MM / MM to CT

Emerald Cut Diamond Conversion Charts From CT to MM / MM to CT
0.08 – 0.74 cts. & 0.74 – 5.25 cts
EMERALD CUT CARAT WEIGHTEMERALD CUT LENGTH MM SIZEEMERALD CUT WIDTH MM SIZE
0.08 – 0.11 ct.2.90 – 3.20 mm.2.10 – 2.30 mm.
0.12 – 0.14 ct.3.20 – 3.40 mm.2.30 – 2.50 mm.
0.13 – 0.15 ct.3.30 – 3.50 mm.2.30 – 2.70 mm.
0.14 – 0.16 ct.3.50 – 3.60 mm.2.60 – 2.80 mm.
0.16 – 0.17 ct.3.70 – 3.80 mm.2.70 – 2.80 mm.
0.18 – 0.21 ct.3.90 – 4.00 mm.2.70 – 2.90 mm.
0.22 – 0.24 ct.4.10 – 4.20 mm.2.90 – 3.10 mm.
0.25 – 0.28 ct.4.30 – 4.40 mm.3.10 – 3.30 mm.
0.30 – 0.34 ct.4.50 – 4.60 mm.3.20 – 3.40 mm.
0.35 – 0.38 ct.4.70 – 4.80 mm.3.40 – 3.50 mm.
0.40 – 0.44 ct.4.90 – 5.00 mm.3.50 – 3.60 mm.
0.45 – 0.48 ct.5.00 – 5.20 mm.3.60 – 3.80 mm.
0.50 – 0.53 ct.5.20 – 5.50 mm.3.80 – 4.00 mm.
0.54 – 0.57 ct.5.50 – 5.70 mm.4.00 – 4.20 mm.
0.60 – 0.68 ct.5.70 – 5.80 mm.4.00 – 4.30 mm.
0.70 – 0.74 ct.5.90 – 6.10 mm.4.20 – 4.50 mm.
EMERALD CUT CARAT WEIGHTEMERALD CUT LENGTH MM SIZEEMERALD CUT WIDTH MM SIZE
0.74 – 0.78 ct.6.10 – 6.20 mm.4.40 – 4.50 mm.
0.80 – 0.88 ct.6.30 – 6.50 mm.4.40 – 4.70 mm.
0.90 – 0.98 ct.6.50 – 6.70 mm.4.60 – 4.90 mm.
1.00 – 1.15 ct.6.80 – 7.00 mm.4.80 – 5.20 mm.
1.20 – 1.27 ct7.00 – 7.40 mm.5.10 – 5.3 mm.
1.30 – 1.45 ct7.20 – 7.60 mm.5.20 – 5.50 mm.
1.50 – 1.60 ct7.50 – 7.80 mm.5.40 – 5.60 mm.
1.65 – 1.80 ct7.70 – 8.20 mm.5.60 – 5.80 mm.
2.00 – 2.30 ct8.10 – 8.80 mm.6.00 – 6.40 mm.
2.40 – 2.60 ct8.80 – 9.40 mm.6.40 – 6.70 mm.
2.70 – 2.90 ct9.10 – 9.60 mm.6.60 – 6.80 mm.
3.00 – 3.30 ct9.40 – 10.00 mm.6.70 – 7.30 mm.
3.40 – 3.60 ct9.70 – 10.40 mm.7.20 – 7.40 mm.
3.70 -3.90 ct9.90 – 10.80 mm.7.30 – 7.50 mm.
4.00 – 4.20 ct10.30 – 10.80 mm.7.50 – 7.90 mm.
4.40 – 4.70 ct10.80 – 11.20 mm.7.90 – 8.10 mm.
5.00 – 5.25 ct11..20 – 11.80 mm.8.10 – 8.30 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Emerald Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 61%

or

68% – 72%

54% – 57%

or

73% – 74%

Depth – %60% – 67%

58% – 61%

or

67% – 70%

 
Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Emerald Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.35 – 1.50

1.30 – 1.40

or

1.50 – 1.60

1.25 – 1.26

or

1.59 – 1.70

Professional Asscher Cut Diamond Size Chart

Asscher Shaped Diamond Size Comparison From CT to MM and Vice Versa

Asscher Cut Diamond CT to MM / MM to CT Conversion Chart
0.04 – 0.75 cts & 0.80 – 5.25 ctscts
ASSCHER CUT CARAT WEIGHTASSCHER CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0,11 ct.2.50 – 2.60 mm.
0.12 – 0.13 ct.2.70 – 2.80 mm.
0.14 -0.17 ct.2.90 – 3.10 mm.
0.18 – 0.21 ct.3.20 – 3.30 mm.
0.22 – 0.24 ct.3.30 – 3.40 mm.
0.25 – 0.28 ct.3.50 – 3.70 mm.
0.30 – 0.35 ct.3.70 – 3.90 mm.
0.35 – 0.40 ct.3.90 – 4.00 mm.
0.40 – 0.45 ct.4.10 – 4.20 mm.
0.45 – 0.50 ct.4.30 – 4.40 mm.
0.55 – 0.60 ct.4.50 – 4.60 mm.
0.60 – 0.65 ct.4.70 – 4.80 mm.
0.70 – 0.75 ct.4.90 – 5.20 mm.
ASSCHER CUT CARAT WEIGHTASSCHER CUT MM SIZE
0.80 – 0.89 ct.5.20 – 5.30 mm.
0.90 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.50 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.20 mm.
1.30 – 1.45 ct6.10 – 6.50 mm.
1.50 – 1.60 ct6.20 – 6.60 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.90 – 7.50 mm.
2.40 – 2.60 ct7.40 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.20 mm.
3.00 – 3.30 ct7.80 – 8.50 mm.
3.40 – 3.60 ct8.30 – 8.70 mm.
3.70 -3.90 ct8.50 – 8.90 mm.
4.00 – 4.20 ct8.70 – 9.20 mm.
4.40 – 4.70 ct9.10 – 9.70 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Asscher Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the recommended Length to Width Ratio of an Asscher Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 to

1.03

1.04 – 1.05

Professional Square Radiant Cut Diamond Size Chart

Square Radiant Shaped Diamond Size Comparison Tool

Radiant Cut Diamond CT to MM / MM to CT Conversion Chart
0.04 – 0.77 cts & 0.80 – 5.25 cts
SQUARE RADIANT CUT CARAT WEIGHTSQUARE RADIANT CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.10 – 0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.90 – 4.00 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.30 – 4.40 mm.
0.50 – 0.55 ct.4.50 – 4.60 mm.
0.55 – 0.58 ct.4.70 – 4.80 mm.
0.60 – 0.68 ct.4.90 – 5.00 mm.
0.70 – 0.77 ct.5.00 – 5.20 mm.
SQUARE RADIANT CUT CARAT WEIGHTSQUARE RADIANT CUT MM SIZE
0.80 – 0.88 ct.5.10 – 5.30 mm.
0.90 – 0.98 ct.5.20 – 5.40 mm.
1.00 – 1.15 ct5.50 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.20 mm.
1.30 – 1.45 ct6.10 – 6.50 mm.
1.50 – 1.60 ct6.20 – 6.60 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.90 – 7.50 mm.
2.40 – 2.60 ct7.40 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.20 mm.
3.00 – 3.30 ct7.80 – 8.50 mm.
3.40 – 3.60 ct8.30 – 8.70 mm.
3.70 -3.90 ct8.50 – 8.90 mm.
4.00 – 4.20 ct8.70 – 9.20 mm.
4.40 – 4.70 ct9.10 – 9.70 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Radiant Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Length to Width Ratio of a Radiant Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 to1.031.04 – 1.05

Professional Rectangular Radiant Cut Diamond Size Chart

Realistic Rectangular Radiant Shaped Diamond Size Comparison from CT TO MM / MM to CT

Rectangular Radiant Cut Diamond CT to MM / MM to CT
0.09 – 0.98 cts
RECTANGULAR RADIANT CUT CARAT WEIGHTRECTANGULAR RADIANT CUT LENGTH MM SIZERECTANGULAR RADIANT CUT WIDTH MM SIZE
0.09 – 0.11 ct.2.90 – 3.10 mm.2.30 – 2.40 mm.
0.11 – 0.13 ct.3.20 – 3.40 mm.2.40 – 2.50 mm.
0.13 – 0.15 ct.3.30 – 3.50 mm.2.40 – 2.60 mm.
0.14 – 0.16 ct.3.50 – 3.60 mm.2.60 – 2.80 mm.
0.18 – 0.20 ct.3.70 – 3.80 mm.2.90 – 3.10 mm.
0.19 – 0.22 ct.3.90 – 4.00 mm.2.90 – 3.10 mm.
0.23 – 0.24 ct.4.10 – 4.20 mm.3.10 – 3.20 mm.
0.25 – 0.28 ct.4.30 – 4.40 mm.3.20 – 3.30 mm.
0.30 – 0.36 ct.4.40 – 4.50 mm.3.30 – 3.50 mm.
0.38 – 0.44 ct.4.70 – 4.80 mm.3.40 – 3.80 mm.
0.43 – 0.48 ct.4.90 – 5.00 mm.3.60 – 3.90 mm.
0.49 – 0.52 ct.5.00 – 5.20 mm.4.00 – 4.20 mm.
0.52 – 0.55 ct.5.20 – 5.40 mm.4.00 – 4.20 mm.
0.60 – 0.67 ct.5.40 – 5.60 mm.4.30 – 4.50 mm.
0.70 – 0.75 ct.5.60 – 5.70 mm.4.50 – 4.60 mm.
0.80 – 0.89 ct.5.70 – 6.00 mm.4.50 – 4.60 mm.
0.90 – 0.98 ct.6.10 – 6.40 mm.4.70 – 4.90 mm.
Newera Diamonds Contact us for any specific size requirement
Rectangular Radiant Cut Diamond CT to MM / MM to CT
1.00 – 5.25 cts
RECTANGULAR RADIANT CUT CARAT WEIGHTRECTANGULAR RADIANT CUT LENGTH MM SIZERECTANGULAR RADIANT CUT WIDTH MM SIZE
1.00 – 1.15 ct.6.50 – 6.80 mm.4.90 – 5.10 mm.
1.20 – 1.27 ct6.80 – 7.30 mm.5.40 – 5.70 mm.
1.30 – 1.45 ct7.00 – 7.40 mm.5.80 – 5.90 mm.
1.50 – 1.60 ct7.30 – 7.90 mm.5.80 – 6.20 mm.
1.65 – 1.80 ct7.50 – 8.10 mm.6.10 – 6.50 mm.
2.00 – 2.30 ct8.00 – 8.60 mm.6.40 – 6.80 mm.
2.40 – 2.60 ct8.50 – 9.00 mm.6.90 – 7.20 mm.
2.70 – 2.90 ct8.90 – 9.40 mm.7.10 – 7.30 mm.
3.00 – 3.30 ct9.20 – 9.80 mm.7.30 – 7.70 mm.
3.40 – 3.60 ct9.40 – 10.00 mm.7.60 – 7.90 mm.
3.70 -3.90 ct9.90 – 11.00 mm.8.00 – 8.40 mm.
4.00 – 4.20 ct10.00 – 11.00 mm.8.10 – 8.50 mm.
4.40 – 4.70 ct10.70 – 11.50 mm.8.40 – 8.70 mm.
5.00 – 5.25 ct11.00- 11.70 mm.8.70 – 9.10 mm.

What is the Ideal Diamond Depth and Table for the Rectangular Radiant Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 59.9%

or

70.1% – 74%

54% – 56.9%

or

74.1% – 78%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
Recommended Length to Width Ratio of Rectangular Radiant Shaped Diamonds?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.20-1.30

1.15 – 1.25

or

1.29 – 1.35

1.10 – 1.15

or

1.36 – 1.40

Professional Heart Diamond Size Chart & Conversion Tool

MM to CT / CT to MM Heart Shaped Diamond Size Comparison

How to Accurately Measure a Heart Shaped Diamond
Heart Shaped Diamond CT to MM / MM to Carat Conversion Charts
0.18-5.20 cts (Excellent Cut) & 0.17 – 2.20 cts (Good Cut)
HEART SHAPE CARAT WEIGHTHEART SHAPE MM SIZE (RATIO of 0.95 – 1.02) EXCELLENT CUT
0.18 – 0.21 ct.3.50 – 3.70 mm.
0.23 – 0.26 ct.3.80 – 4.10 mm.
0.27 – 0.29 ct.4.20 – 4.40 mm.
0.30 – 0.38 ct.4.50 – 4.70 mm.
0.40 – 0.45 ct.4.90 – 5.10 mm.
0.50 – 0.57 ct.5.20 – 5.50 mm.
0.60 – 0.65 ct.5.60 – 5.70 mm.
0.70 – 0.75 ct.5.80 – 6.10 mm.
0.80 – 0.85 ct.6.10 – 6.30 mm.
0.90 – 0.95 ct.6.20 – 6.50 mm.
1.00 – 1.10 ct.6.40 – 6.70 mm.
1.20 – 1.30 ct.7.00 – 7.40 mm.
1.50 – 1.60 ct.7.50 – 7.90 mm.
1.70 – 1.80 ct.8.00 – 8.20 mm.
2.00 – 2.20 ct.8.30 – 8.60 mm.
2.40 – 2.60 ct.8.40 – 8.90 mm.
2.70 – 2.85 ct.8.80 – 9.30 mm.
3.00 – 3.20 ct.9.30 – 9.80 mm.
3.40 – 3.60 ct.9.50 – 9.90 mm.
4.00 – 4.20 ct.9.80 – 10.00 mm.
4.40 – 4.60 ct.9.90 – 10.30mm.
5.00 – 5.20 ct.10.50 – 11.10 mm.
HEART SHAPE CARAT WEIGHTHEART SHAPE MM SIZE (RATIO of 0.90 – 1.05) VERY GOOD CUT
0.17 – 0.21 ct.3.30 – 3.70 mm.
0.23 – 0.26 ct.3.60 – 3.90 mm.
0.27 – 0.29 ct.4.00 – 4.30 mm.
0.30 – 0.38 ct.4.20 – 4.60 mm.
0.40 – 0.45 ct.4.60 – 4.90 mm.
0.50 – 0.57 ct.4.90 – 5.30 mm.
0.60 – 0.65 ct.5.30 – 5.70 mm.
0.70 – 0.75 ct.5.50 – 5.80 mm.
0.80 – 0.85 ct.5.80 – 6.00 mm.
0.90 – 0.95 ct.5.90 – 6.30 mm.
1.00 – 1.10 ct.6.10 – 6.50 mm.
1.20 – 1.30 ct.6.60 – 7.00 mm.
1.50 – 1.60 ct.7.10 – 8.50 mm.
1.70 – 1.80 ct.5.00 – 5.30 mm.
2.00 – 2.20 ct.7.90 – 8.20 mm.
2.40 – 2.60 ct.8.00 – 8.50 mm.
2.70 – 2.85 ct.8.40 – 9.00 mm
3.00 – 3.20 ct.8.90 – 9.30 mm.
3.40 – 3.60 ct.9.00 – 9.40 mm.
4.00 – 4.20 ct.9.30 – 9.50 mm.
4.40 – 4.60 ct.9.40 – 9.80 mm.
5.00 – 5.20 ct.9.80 – 10.80 mm.
Newera Diamonds Contact us for any specific size requirement

Recommended Dpeth and Table for Heart Shapes
 EXCELLENTVERY GOODGOOD
Table – %53% – 63%

52%

or

64% – 65%

51%

or

66% – 68%

Depth – %58% – 62%

56% – 57.9%

or

62.1% – 66%

53% – 55.9%

or

66.1% – 71%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Recommended Length to Width Ratio in Heart Cut Diamonds?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio0.95 – 1.02

0.89 – 0.94

or

1.03 – 1.05

0.83 – 0.87

or

1.06 – 1.10

Professional Marquise Diamond Size Chart

CT to MM / MM to CT Marquise Shaped Diamond Size Comparison Chart

Marquise Cut Diamond CT to MM / MM CT Conversion Shart
0.04 – 1.10 cts & 1.20 – 5.25 cts
MARQUISE CUT CARAT WEIGHTMARQUISE CUT LENGTH MM SIZEMARQUISE CUT WIDTH MM SIZE
0.04 – 0.07 ct.3.80 – 4.30 mm.1.80 – 2.10 mm.
0.08 – 0.12 ct.4.20 – 4.90 mm.2.20 – 2.60 mm.
0.13 – 0.17 ct.4.90 – 5.70 mm.2.50 – 2.90 mm.
0.18 – 0.22 ct.5.60 – 6.30 mm.2.90 – 3.30 mm.
0.23 – 0.28 ct.6.00 – 6.70 mm.3.10 – 3.40 mm.
0.30 – 0.37 ct.6.50 – 7.20 mm.3.40 – 3.70 mm.
0.40 – 0.48 ct.7.10 – 7.80 mm.3.70 – 4.20 mm.
0.50 – 0.59 ct.7.50 – 8.50 mm.4.00 – 4.30 mm.
0.60 – 0.67 ct.8.50 – 8.90 mm.4.20 – 4.50 mm.
0.70 – 0.78 ct.8.80 – 9.30 mm.4.40 – 4.70 mm.
0.80 – 0.88 ct.9.30 – 9.80 mm.4.70 – 4.80 mm.
0.90 – 0.98 ct.9.30 – 10.00 mm.4.80 – 5.10 mm.
1.00 -1.10 ct.9.80 – 11.00 mm.5.00 – 5.30 mm.
MARQUISE CUT CARAT WEIGHTMARQUISE CUT LENGTH MM SIZEMARQUISE CUT WIDTH MM SIZE
1.20 – 1.27 ct10.60 – 11.50 mm.5.30 – 5.50 mm.
1.30 – 1.45 ct11.30 – 12.00 mm.5.60 – 5.70 mm.
1.50 – 1.60 ct11.80 – 12.20 mm.5.80 – 6.00 mm.
1.65 – 1.80 ct12.30 – 12.50 mm.6.00 – 6.20 mm.
2.00 – 2.30 ct12.60 – 13.50 mm.6.30 – 6.50 mm.
2.40 – 2.60 ct13.60 – 14.40 mm.6.60 – 7.00 mm.
2.70 – 2.90 ct14.40 – 14.80 mm.7.00 – 7.40 mm.
3.00 – 3.30 ct14.60 – 15.30 mm.7.50 – 7.70 mm.
3.40 – 3.60 ct15.50 – 16.10 mm.7.70 – 7.90 mm.
3.70 -3.90 ct16.20 – 16.40 mm.8.00 – 8.20 mm.
4.00 – 4.20 ct16.40 – 16.80 mm.8.20 – 8.40 mm.
4.40 – 4.70 ct16.70 – 17.30 mm.8.30 – 8.50 mm.
5.00 – 5.25 ct17.40- 17.80 mm.8.60 – 9.20 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Marquise Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the recommended Length to Width Ratio of Marquise Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.85 – 2.00

1.75 – 1.84

or

2.01 – 2.15

1.65 – 1.74

or

2.16 – 2.30

Professional Baguette Diamond Size Chart

Baguette Shaped Diamond Size Comparison of CT to MM / MM to CT

Tapered Baguette MM Width
MM Length1.20 – 1.301.40 – 1.501.60 – 1.701.80 – 1.902.00 – 2.102.20 – 2.302.40 – 2.502.60 – 2.702.80 – 2.903.00 – 3.10
2.50 – 2.600.03 – 0.040.04 – 0.050.05 – 0.060.06 – 0.070.08 – 0.090.09 – 0.110.10 – 0.110.11 – 0.120.13 – 0.140.14 – 0.15
2.70 – 2.800.03 – 0.040.04 – 0.050.04 – 0.050.06 – 0.080.08 – 0.100.09 – 0.110.10 – 0.120.12 – 0.130.13 – 0.140.14 – 0.16
2.90 – 3.000.04 – 0.050.05 – 0.070.05 – 0.070.07 – 0.090.09 – 0.110.11 – 0.130.11 – 0.130.13 – 0.140.14 – 0.160.14 – 0.16
3.10 – 3.200.04 – 0.060.06 – 0.070.06 – 0.070.07 – 0.090.09 – 0.110.11 – 0.130.12 – 0.140.14 – 0.150.15 – 0.160.15 – 0.17
3.30 – 3.400.05 – 0.070.06 – 0.080.07 – 0.080.08 – 0.090.09- 0.110.10 – 0.120.13 – 0.140.14 – 0.160.16- 0.170.16- 0.18
3.50- 3.600.06- 0.07

0.07

– 0.08

0.08

– 0.09

0.09

– 0.10

0.10

– 0.11

0.11 – 0.120.14 – 0.150.15 – 0.170.15- 0.180.17- 0.18
3.70 – 3.800.06 – 0.070.07 – 0.080.08 – 0.090.10 – 0.110.10- 0.120.12 – 0.130.15 – 0.160.17 – 0.180.18- 0.200.19- 0.22
3.90 – 4.000.06 – 0.080.07 – 0.090.08 – 0.100.10- 0.120.12 – 0.140.13 – 0.150.17 – 0.180.18- 0.190.20- 0.220.21 – 0.24
4.10 – 4.200.06 – 0.080.07 – 0.090.08 – 0.100.11- 0.130.12 – 0.140.14 – 0.160.17 – 0.190.19- 0.210.21- 0.230.23 – 0.25
4.30 – 4.400.08 – 0.090.09 – 0.110.10 – 0.120.13 – 0.150.14 – 0.160.18 – 0.200.21 – 0.230.23 – 0.260.26 – 0.280.28 – 0.30
4.50 – 4.600.09 – 0.100.11 – 0.120.12 – 0.130.15 – 0.170.17 – 0.190.19 – 0.210.22 – 0.240.24 – 0.270.27 – 0.300.30 – 0.33
4.70
4.80		0.10
0.11		0.11
0.12		0.12
0.14		0.15
0.16		0.16
0.18		0.18
0.20		0.20
0.22		0.23
0.25		0.25
0.28		0.28
0.31
4.90
5.00		0.10
0.12		0.11
0.13		0.12
0.15		0.14
0.16		0.17
0.18		0.18
0.21		0.21
0.23		0.23
0.26		0.27
0.30		0.30
0.33
5.10
5.20		0.11
0.13		0.12
0.14		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.22		0.22
0.24		0.24
0.28		0.28
0.32		0.31
0.35
5.30
5.40		0.11
0.14		0.13
0.15		0.15
0.17		0.16
0.18		0.18
0.20		0.21
0.23		0.23
0.25		0.25
0.29		0.28
0.33		0.33
0.37
5.50
5.60		0.11
0.14		0.13
0.16		0.15
0.18		0.17
0.20		0.20
0.22		0.22
0.24		0.25
0.29		0.28
0.31		0.30
0.35		0.35
0.39

Professional Tapered Baguette Diamond Size Chart

Realistic CT to MM / MM to CT Tapered Baguette Size Comparison

Tapered Baguette MM Width
MM Length1.20
1.30		1.40
1.50		1.60
1.70		1.80
1.90		2.00
2.10		2.20
2.30		2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
2.50
2.60		0.02
0.03		0.03
0.04		0.04
0.05		0.05
0.06		0.07
0.07		0.07
0.08		0.08
0.09		0.09
0.10		0.11
0.11		0.11
0.12
2.70
2.80		0.02
0.03		0.03
0.04		0.04
0.05		0.05
0.07		0.07
0.08		0.08
0.09		0.08
0.10		0.10
0.11		0.10
0.11		0.11
0.13
2.90
3.00		0.03
0.04		0.04
0.06		0.05
0.06		0.06
0.07		0.07
0.09		0.09
0.10		0.09
0.11		0.11
0.11		0.11
0.13		0.11
0.13
3.10
3.20		0.03
0.05		0.04
0.06		0.05
0.06		0.06
0.07		0.07
0.09		0.09
0.11		0.10
0.11		0.11
0.12		0.12
0.12		0.12
0.14
3.30
3.40		0.04
0.06		0.05
0.07		0.06
0.07		0.06
0.07		0.07
0.09		0.08
0.10		0.11
0.11		0.11
0.13		0.13
0.14		0.13
0.15
3.50
3.60		0.05
0.06		0.06
0.07		0.06
0.07		0.07
0.08		0.08
0.09		0.09
0.11		0.11
0.12		0.12
0.14		0.12
0.14		0.14
0.15
3.70
3.80		0.05
0.06		0.06
0.07		0.07
0.08		0.08
0.09		0.10
0.10		0.11
0.12		0.12
0.13		0.14
0.15		0.16
0.16		0.16
0.18
3.90
4.00		0.05
0.07		0.06
0.07		0.07
0.08		0.08
0.10		0.10
0.11		0.11
0.12		0.14
0.15		0.15
0.16		0.16
0.18		0.17
0.20
4.10
4.20		0.05
0.07		0.06
0.07		0.07
0.08		0.09
0.11		0.10
0.11		0.14
0.15		0.16
0.17		0.17
0.19		0.19
0.21		0.21
0.23
4.30
4.40		0.07
0.07		0.07
0.09		0.08
0.10		0.11
0.13		0.12
0.15		0.15
0.17		0.17
0.19		0.19
0.21		0.21
0.23		0.23
0.25
4.50
4.60		0.07
0.08		0.08
0.10		0.09
0.11		0.11
0.12		0.14
0.16		0.16
0.17		0.18
0.20		0.20
0.22		0.22
0.25		0.23
0.27
4.70
4.80		0.08
0.09		0.09
0.10		0.10
0.11		0.12
0.13		0.15
0.16		0.16
0.19		0.19
0.21		0.21
0.23		0.23
0.25		0.25
0.27
4.90
5.00		0.08
0.10		0.09
0.11		0.10
0.12		0.11
0.13		0.14
0.17		0.17
0.19		0.19
0.22		0.22
0.25		0.25
0.27		0.27
0.30
5.10
5.20		0.09
0.11		0.10
0.11		0.11
0.12		0.12
0.14		0.14
0.16		0.16
0.18		0.18
0.19		0.20
0.23		0.23
0.26		0.25
0.29
5.30
5.40		0.09
0.11		0.11
0.12		0.12
0.14		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.21		0.21
0.24		0.23
0.27		0.27
0.30
5.50
5.60		0.09
0.11		0.11
0.13		0.12
0.15		0.14
0.16		0.16
0.18		0.18
0.20		0.21
0.24		0.23
0.25		0.25
0.29		0.29
0.32

Professional Trapezoid Cut Diamond Size Chart

CT TO MM / MM to CT Size Comparison Tool for Trapezoid Diamonds

Trapezoid Brilliant Cut Diamond Pairs Conversion 0.28 – 1.30 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.28 – 0.32 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.2.60 – 2.75 mm
0.31 – 0.35 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.2.60 – 2.75 mm
0.31 – 0.34 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.2.90 – 3.00 mm
0.38- 0.44 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.2.90 – 3.00 mm
0.32 – 0.37 ct tw4.10 – 4.20 mm.2.70 – 2.80 mm.3.10 – 3.20 mm
0.40 – 0.44 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.3.20 – 3.45 mm
0.38 – 0.44 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.3.30 – 3.50 mm
0.43 – 0.47 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.3.30 – 3.50 mm
0.40 – 0.44 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.3.60 – 3.90 mm
0.44 – 0.47 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.3.60 – 3.90 mm
0.40 – 0.45 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.3.90 – 4.10 mm
0.50 – 0.55 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.3.90 – 4.10 mm
0.58 – 0.64 ct tw4.90- 5.20 mm.3.20 – 3.30 mm.3.95 – 4.20 mm
0.55 – 0.64 ct tw5.40 – 5.60 mm.2.90 – 3.10 mm.4.30 – 4.50 mm
0.64 – 0.75 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.4.00 – 4.40 mm
0.58 – 0.75 ct tw5.90 – 6.20 mm.2.90 – 3.10 mm.4.70 – 5.00 mm
0.75 – 0.85 ct tw5.90 – 6.20 mm.3.30 – 3.50 mm.4.90 – 5.10 mm
0.80 – 1.00 ct tw5.90 – 6.20 mm.3.60 – 4.00 mm.4.50 – 4.80 mm
0.85 – 1.10 ct tw6.40 – 6.60 mm.3.80 – 4.20 mm.4.80 – 5.20 mm.
0.97 – 1.20 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.4.80 – 5.20 mm.
1.10 – 1.30 ct tw6.80 – 7.20 mm.4.00 – 4.30 mm.5.00 – 5.50 mm.
Trapezoid Brilliant Cut Diamond Pairs Conversion Chart 0.22 – 2.60 ctw With Sharper Angled Corners of 60 °

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.22 – 0.26 ct tw3.70 – 4.00 mm.2.50 – 2.70 mm.1.70 – 1.80 mm
0.26 – 0.30 ct tw4.00 – 4.50 mm.2.70 – 3.00 mm.1.85 – 2.00 mm
0.30 – 0.34 ct tw4.20 – 4.60 mm.2.85 – 3.15 mm.1.90 – 2.10 mm
0.36 – 0.38 ct tw4.40 – 4.70 mm.3.00 – 3.20 mm.2.00 – 2.15 mm
0.38 – 0.42 ct tw4.70 – 4.90 mm.3.15 – 3.30 mm.2.15 – 2.25 mm
0.42 – 0.46 ct tw4.90 – 5.20 mm.3.30 – 3.50 mm.2.25 – 2.40 mm
0.48 – 0.50 ct tw5.20 – 5.50 mm.3.50 – 3.75 mm.2.40 – 2.50 mm
0.52 – 0.58 ct tw5.50 – 5.70 mm.3.75 – 3.85 mm.2.50 – 2.60 mm
0.62 – 0.66 ct tw5.60 -5.90 mm.3.80 – 4.00 mm.2.60 – 2.70 mm
0.70 – 0.76 ct tw5.90 – 6.30 mm.4.00 – 4.25 mm.2.70 – 2.90 mm
0.78 – 0.80 ct tw6.20 – 6.50 mm.4.10 – 4.30 mm.2.85- 3.00 mm
0.84 – 0.92 ct tw6.40 – 6.70 mm.4.15 – 4.40 mm.2.95 – 3.10 mm
0.96 – 1.02 ct tw6.60 – 6.80 mm.4.15 – 4.40 mm.3.00 – 3.15 mm
1.06 – 1.14 ct tw6.80 – 7.30 mm.4.25- 4.60 mm.3.15 – 3.35 mm
1.24 – 1.38 ct tw7.20 – 7.50 mm.4.55 – 4.75 mm.3.30 – 3.45 mm.
1.40 – 1.54 ct tw7.40 – 7.70 mm.4.70 – 4.85 mm.3.40 – 3.55 mm.
1.58 – 1.72 ct tw7.60 – 8.10 mm.4.75 – 5.10 mm.3.50 – 3.70 mm.
1.76 – 2.00 ct tw8.00 – 8.70 mm.5.00 – 5.50 mm.3.70 – 4.00 mm.
2.10 – 2.60 ct tw8.40 – 9.40 mm5.25 – 5.80 mm.3.90 – 4.30 mm.
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.29 – 1.40 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.29 – 0.33 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.2.60 – 2.75 mm
0.32- 0.36 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.2.60 – 2.75 mm
0.32 – 0.35 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.2.90 – 3.00 mm
0.39- 0.45 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.2.90 – 3.00 mm
0.33 – 0.38 ct tw4.10 – 4.20 mm.2.70 – 2.80 mm.3.10 – 3.20 mm
0.41- 0.46 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.3.20 – 3.45 mm
0.39 – 0.45 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.3.30 – 3.50 mm
0.44 – 0.48 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.3.30 – 3.50 mm
0.41 – 0.45 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.3.60 – 3.90 mm
0.45 – 0.49 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.3.60 – 3.90 mm
0.41 – 0.47 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.3.90 – 4.10 mm
0.51 – 0.57 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.3.90 – 4.10 mm
0.59 – 0.66 ct tw4.90- 5.20 mm.3.20 – 3.30 mm.3.95 – 4.20 mm
0.57 – 0.67 ct tw5.40 – 5.60 mm.2.90 – 3.10 mm.4.30 – 4.50 mm
0.66 – 0.77 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.4.00 – 4.40 mm
0.60 – 0.78 ct tw5.90 – 6.20 mm.2.90 – 3.10 mm.4.70 – 5.00 mm
0.77 – 0.88 ct tw5.90 – 6.20 mm.3.30 – 3.50 mm.4.90 – 5.10 mm
0.80 – 1.10 ct tw5.90 – 6.20 mm.3.60 – 4.00 mm.4.50 – 4.80 mm
0.90 – 1.15 ct tw6.40 – 6.60 mm.3.80 – 4.20 mm.4.80 – 5.20 mm.
1.00 – 1.25 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.4.80 – 5.20 mm.
1.15 – 1.40 ct tw6.80 – 7.20 mm.4.00 – 4.30 mm.5.00 – 5.50 mm.
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.22 – 2.60 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.22 – 0.26 ct tw3.70 – 4.00 mm.2.50 – 2.70 mm.1.70 – 1.80 mm
0.26 – 0.30 ct tw4.00 – 4.50 mm.2.70 – 3.00 mm.1.85 – 2.00 mm
0.30 – 0.34 ct tw4.20 – 4.60 mm.2.85 – 3.15 mm.1.90 – 2.10 mm
0.36 – 0.38 ct tw4.40 – 4.70 mm.3.00 – 3.20 mm.2.00 – 2.15 mm
0.38 – 0.42 ct tw4.70 – 4.90 mm.3.15 – 3.30 mm.2.15 – 2.25 mm
0.42 – 0.46 ct tw4.90 – 5.20 mm.3.30 – 3.50 mm.2.25 – 2.40 mm
0.48 – 0.50 ct tw5.20 – 5.50 mm.3.50 – 3.75 mm.2.40 – 2.50 mm
0.52 – 0.58 ct tw5.50 – 5.70 mm.3.75 – 3.85 mm.2.50 – 2.60 mm
0.62 – 0.66 ct tw5.60 -5.90 mm.3.80 – 4.00 mm.2.60 – 2.70 mm
0.70 – 0.76 ct tw5.90 – 6.30 mm.4.00 – 4.25 mm.2.70 – 2.90 mm
0.78 – 0.80 ct tw6.20 – 6.50 mm.4.10 – 4.30 mm.2.85- 3.00 mm
0.84 – 0.92 ct tw6.40 – 6.70 mm.4.15 – 4.40 mm.2.95 – 3.10 mm
0.96 – 1.02 ct tw6.60 – 6.80 mm.4.15 – 4.40 mm.3.00 – 3.15 mm
1.06 – 1.14 ct tw6.80 – 7.30 mm.4.25- 4.60 mm.3.15 – 3.35 mm
1.24 – 1.38 ct tw7.20 – 7.50 mm.4.55 – 4.75 mm.3.30 – 3.45 mm.
1.40 – 1.54 ct tw7.40 – 7.70 mm.4.70 – 4.85 mm.3.40 – 3.55 mm.
1.58 – 1.72 ct tw7.60 – 8.10 mm.4.75 – 5.10 mm.3.50 – 3.70 mm.
1.76 – 2.00 ct tw8.00 – 8.70 mm.5.00 – 5.50 mm.3.70 – 4.00 mm.
2.10 – 2.60 ct tw8.40 – 9.40 mm5.25 – 5.80 mm.3.90 – 4.30 mm.

Professional Half Moon Cut Diamond Size Chart

MM to CT / CT TO MM Size Comparison Tool of Half Moon Shaped Diamonds

Half Moon Cut Diamond Conversion Charts From CT to MM / MM to CT
0.25 – 1.30 ctw
PAIR AVERAGE TOTAL WEIGHTHALF MOON LENGTH MM SIZEHALF MOON WIDTH MM SIZE
0.25 – 0.27 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.
0.28 – 0.32 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.
0.30 – 0.35 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.
0.36- 0.38 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.
0.30 – 0.33 ct tw4.20 – 4.10 mm.2.70 – 2.80 mm.
0.36 – 0.40 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.
0.36 – 0.39 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.
0.42 – 0.45 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.
0.38 – 0.43 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.
0.43 – 0.46 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.
0.39 – 0.44 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.
0.46 – 0.50 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.
0.53 – 0.57 ct tw4.90 – 5.20 mm.3.20 – 3.30 mm.
0.56 – 0.61 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.
0.70 – 0.80 ct tw5.90 – 6.20 mm.3.40 – 3.70 mm.
0.90 – 1.00 ct tw5.90 – 6.20 mm.3.80 – 4.20 mm.
0.95 – 1.20 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.
1.10 – 1.30 ct tw6.80 – 7.20 mm.4.20 – 4.50 mm.

Straight Bullet Cut Diamond Size Chart

Size Comparison Tool for Straight Bullet Shaped Diamonds

Straight Bullet MM Width
MM Length2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
3.90
4.00		0.15
0.16		0.16
0.17		0.18
0.19		0.18
0.21
4.10
4.20		0.15
0.17		0.17
0.18		0.18
0.20		0.20
0.22
4.30
4.40		0.16
0.18		0.18
0.20		0.20
0.23		0.23
0.25
4.50
4.60		0.17
0.18		0.19
0.21		0.21
0.24		0.24
0.26
4.70
4.80		0.18
0.19		0.20
0.22		0.22
0.25		0.25
0.27
4.90
5.00		0.18
0.20		0.20
0.23		0.24
0.26		0.26
0.29
5.10
5.20		0.19
0.20		0.21
0.25		0.25
0.27		0.27
0.31
5.30
5.40		0.20
0.22		0.22
0.26		0.25
0.29		0.29
0.33
5.50
5.60		0.22
0.26		0.25
0.27		0.26
0.31		0.31
0.34

Professional Tapered Bullet Cut Diamond Size Chart

Size Comparison Tool of Tapered Bullet Shaped Diamonds From CT to MM / MM to CT

Straight Bullet MM Width
MM Length2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
3.90
4.00		0.12
0.13		0.13
0.13		0.14
0.15		0.15
0.17
4.10
4.20		0.12
0.13		0.15
0.15		0.15
0.16		0.16
0.18
4.30
4.40		0.13
0.14		0.15
0.16		0.16
0.18		0.18
0.20
4.50
4.60		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.21
4.70
4.80		0.14
0.15		0.16
0.18		0.18
0.20		0.20
0.22
4.90
5.00		0.15
0.16		0.16
0.18		0.19
0.21		0.21
0.23
5.10
5.20		0.15
0.16		0.17
0.20		0.20
0.22		0.22
0.25
5.30
5.40		0.20
0.22		0.18
0.20		0.20
0.23		0.23
0.26
5.50
5.60		0.18
0.20		0.20
0.22		0.21
0.25		0.25
0.27

Professional Shield Cut Diamond Size Chart

Size Comparison Tool for Shieldt Shaped Diamonds From CT to MM / MM to CT

Shield Cut Diamond Conversion Chart 0.13 – 1.45 ctw
PAIR AVERAGE TOTALE WEIGHTLENGTH MM SIZEWIDTH MM SIZE
0.13 – 0.17 ct tw3.60 – 4.10 mm.3.20 – 2.90 mm.
0.18 – 0.22 ct tw4.20 – 4 .40 mm.3.60 – 4.00 mm.
0.23 – 0.27 ct tw4.30 – 5.10 mm.3.90 – 4.80 mm.
0.28 – 0.37 ct tw4.80 – 5.60 mm.4.20 – 5.00 mm.
0.38 – 0.47 ct tw5.20 – 5.80 mm.4.80 – 5.30 mm.
0.48 – 0.59 ct tw5.40- 6.00 mm.5.00 – 5.80 mm.
0.60 – 0.68 ct tw5.80 – 6.30 mm.5.40- 6.00 mm.
0.70- 0.78 ct tw6.20- 6.80 mm.6.10 – 6.80 mm.
0.80 – 0.89 ct tw6.70 – 7.40 mm.6.50 – 7.20 mm.
0.90 – 0.98 ct tw7.20 – 7.80 mm.6.30 – 7.30 mm.
1.00 – 1.10 ct tw7.60 – 8.50 mm.6.70 – 7.60 mm.
1.18 – 1.45 ct tw8.00 – 8.90 mm.7.20 – 8.10 mm.

Professional Trilliant Cut Diamond Size Chart

MM to CT / CT to MM Trilliant Shaped DIamond Size Comparison Tool

Trilliant Cut Diamond CT to MM / MM to CT Size Chart
Trillion Base to Point From CT to MM
0.04 – 0.69 cts & 0.70 – 5.25 cts
CARAT WEIGHTBASE TO POINT MM SIZE
0.03 – 0.04 ct.2.20 – 2.40 mm.
0.05 – 0.06 ct.2.50 – 2.80 mm.
0.07 – 0.08 ct.3.00 – 3.20 mm.
0.08 – 0.11 ct.3.10 – 3.30 mm.
0.13 – 0,15 ct.3.30 – 3.60 mm.
0.15 – 0.17 ct.3.60 – 4.10 mm.
0.17 – 0.19 ct.3.80 – 4.20 mm.
0.20 – 0.21 ct.4.00 – 4.30 mm.
0.22 – 0.24 ct.4.20 – 4.40 mm.
0.24 – 0.26 ct.4.40 – 4.70 mm.
0.27 – 0.28 ct.4.70 – 5.00 mm.
0.30 – 0.33 ct.5.00 – 5.10 mm.
0.35 – 0.38 ct.5.10 – 5.30 mm.
0.40 – 0.43 ct.5.30 – 5.70 mm.
0.44 – 0.46 ct.5.60 – 5.90 mm.
0.48 – 0.52 ct.5.70 – 6.00 mm.
0.55 – 0.58 ct.5.90 – 6.20 mm.
0.60 – 0.65 ct.6.10 – 6.60 mm.
0.70 – 0.78 ct.6.50 – 6.80 mm.
0.80 – 0.87 ct.6.70 – 6.90 mm.
0.90 – 0.98 ct.6.80 – 7.30 mm.
1.00 – 1.15 ct.7.20 – 7.80 mm
1.18 – 1.45 ct7.50 – 8.30 mm
CARAT WEIGHTBASE TO POINT MM SIZE
0.03 – 0.04 ct.2.40 – 2.60 mm.
0.05 – 0.06 ct.2.80 – 3.10 mm.
0.07 – 0.08 ct.3.20 – 3.50 mm.
0.08 – 0.11 ct.3.40 – 3.70 mm.
0.13 – 0,15 ct.3.70 – 4.00 mm.
0.15 – 0.17 ct.4.00 – 4.50 mm.
0.17 – 0.19 ct.4.20 – 4.60 mm.
0.20 – 0.21 ct.4.40 – 4.70 mm.
0.22 – 0.24 ct.4.70 – 4.90 mm.
0.24 – 0.26 ct.4.90 – 5.20 mm.
0.27 – 0.28 ct.5.20 – 5.50 mm.
0.30 – 0.33 ct.5.50 – 5.70 mm.
0.35 – 0.38 ct.5.60 -5.90 mm.
0.40 – 0.43 ct.5.90 – 6.30 mm.
0.44 – 0.46 ct.6.20 – 6.50 mm.
0.48 – 0.52 ct.6.40 – 6.70 mm.
0.55 – 0.58 ct.6.60 – 6.80 mm.
0.60 – 0.65 ct.6.80 – 7.30 mm.
0.70 – 0.78 ct.7.20 – 7.50 mm.
0.80 – 0.87 ct.7.40 – 7.70 mm.
0.90 – 0.98 ct.7.60 – 8.10 mm.
1.00 – 1.15 ct.8.00 – 8.70 mm.
1.18 – 1.45 ct8.40 – 9.40 mm
Newera Diamonds Contact us for any specific size requirement

Professional Size Conversion Chart for Calf Cut Diamonds

Calf Cut Diamond Conversion Chart – CT to MM / MM to CT

Cushion Cut MM to Carat Diamond Conversion Charts
0.12 – 1.38 cts​
CARAT WEIGHTTOP HORIZONTAL LENGTH MM SIZEVERTICAL WIDTH MM SIZE
0.12 – 0,14 ct.3.50 – 3.80 mm.3.20 – 3.40 mm.
0.14 – 0.16 ct.3.80 – 4.30 mm.3.40 – 3.80 mm.
0.16 – 0.18 ct.4.00 – 4.40 mm.3.60 – 3.90 mm.
0.19 – 0.20 ct.4.20 – 4.50 mm.3.70 – 4.00 mm.
0.21 – 0.23 ct.4.40 – 4.70 mm.4.00 – 4.20 mm.
0.23 – 0.25 ct.4.60 – 5.00 mm.4.20 – 4.40 mm.
0.26 – 0.27 ct.5.00 – 5.20 mm.4.40 – 4.70 mm.
0.29 – 0.31 ct.5.20 – 5.40 mm.4.70 – 4.90 mm.
0.33 – 0.36 ct.5.30 -5.60 mm.4.80 -5.00 mm.
0.38 – 0.41 ct.5.60 – 6.00 mm.5.00 – 5.40 mm
0.42 – 0.44 ct.5.90 – 6.20 mm.5.30 – 5.50 mm.
0.46 – 0.49 ct.6.10 – 6.30 mm.5.50 – 5.70 mm.
0.52 – 0.55 ct.6.30 – 6.40 mm.5.70 – 5.80 mm.
0.57 – 0.62 ct.6.40 – 6.90 mm.6.40 – 6.90 mm.
0.67 – 0.74 ct.6.90 – 7.10 mm.6.80 – 7.10 mm.
0.76 – 0.83 ct.7.00 – 7.30 mm.7.00 – 7.30 mm.
0.86 – 0.93 ct.7.20 – 7.70 mm.7.20 – 7.70 mm.
0.95 – 1.09 ct.7.60 – 8.20 mm.7.60 – 8.25 mm.
1.12 – 1.38 ct8.00 – 8.90 mm8.00 – 8.90 mm

Professional Size Conversion Chart for Calf Cut Diamonds

Calf Cut Diamond Conversion Chart – CT to MM / MM to CT

0.12 – 1.38 cts​​
CARAT WEIGHTTOP HORIZONTAL LENGTH MM SIZEVERTICAL WIDTH MM SIZE
0.12 – 0,14 ct.3.50 – 3.80 mm.3.20 – 3.40 mm.
0.14 – 0.16 ct.3.80 – 4.30 mm.3.40 – 3.80 mm.
0.16 – 0.18 ct.4.00 – 4.40 mm.3.60 – 3.90 mm.
0.19 – 0.20 ct.4.20 – 4.50 mm.3.70 – 4.00 mm.
0.21 – 0.23 ct.4.40 – 4.70 mm.4.00 – 4.20 mm.
0.23 – 0.25 ct.4.60 – 5.00 mm.4.20 – 4.40 mm.
0.26 – 0.27 ct.5.00 – 5.20 mm.4.40 – 4.70 mm.
0.29 – 0.31 ct.5.20 – 5.40 mm.4.70 – 4.90 mm.
0.33 – 0.36 ct.5.30 -5.60 mm.4.80 -5.00 mm.
0.38 – 0.41 ct.5.60 – 6.00 mm.5.00 – 5.40 mm
0.42 – 0.44 ct.5.90 – 6.20 mm.5.30 – 5.50 mm.
0.46 – 0.49 ct.6.10 – 6.30 mm.5.50 – 5.70 mm.
0.52 – 0.55 ct.6.30 – 6.40 mm.5.70 – 5.80 mm.
0.57 – 0.62 ct.6.40 – 6.90 mm.6.40 – 6.90 mm.
0.67 – 0.74 ct.6.90 – 7.10 mm.6.80 – 7.10 mm.
0.76 – 0.83 ct.7.00 – 7.30 mm.7.00 – 7.30 mm.
0.86 – 0.93 ct.7.20 – 7.70 mm.7.20 – 7.70 mm.
0.95 – 1.09 ct.7.60 – 8.20 mm.7.60 – 8.25 mm.
1.12 – 1.38 ct8.00 – 8.90 mm8.00 – 8.90 mm
Newera Diamonds Contact us for any specific size requirement

Professional Brilliant Round Cut Diamond Carat MM Conversion

MM to CT Round Cut Size Comparison Tool

Brilliant Round Cut Diamond Carat MM
0.21 – 5.20 cts
ROUND CUT CARAT WEIGHTROUND CUT MM SIZE
0.21 – 0.22 ct3.80 – 3.90mm
0.23 – 0.24 ct3.90 – 4.00mm
0.25 – 0.26 ct4.00 – 4.10mm
0.26 – 0.27 ct4.10 – 4.20mm
0.27- 0.28 ct4.20 – 0.43 mm
0.30 -0.36 ct4.40 – 4.50 mm
0.40 – 0.45 ct4.60 – 4.70 mm
0.46 – 0.48 ct4.90 – 5.00 mm
0.50 – 0.57 ct5.10 – 5.30 mm
0.60 – 0.67 ct5.40 – 5.60 mm
0.70 – 0.77 ct5.70 – 5.90 mm
0.80 – 0.85 ct6.00 – 6.10 mm
0.90 – 0.95 ct6.20 – 6.30 mm
1.00 – 1.10 ct6.40 – 6.60 mm
1.22 – 1.26 ct6.70 – 6.80 mm
1.28 – 1.30 ct6.90 – 7.10 mm
1.50 – 1.55 ct7.20 – 7.40 mm
1.67 – 1.80 ct7.50 – 7.90 mm
2.00 – 2.10 ct8.10 – 8.30 mm
2.40 – 2.60 ct8.50 – 8.80 mm
2.70 – 2.80 ct8.90 – 9.10 mm
3.00 – 3.10 ct9.20 – 9.40 mm
3.30 – 3.40 ct9.50 – 9.60 mm
3.50 – 3.70 ct6.70 – 7.80 mm
3.80 – 3.90 ct9.90 – 10.00 mm
4.00 – 4.10 ct10.10 – 10.20 mm
3.30 – 4.40 ct10.30 – 10.50 mm
4.50 – 4.60 ct10.60 – 10.70 mm
4.70 – 4.80 ct10.80 – 10.90 mm
4.90 – 4.99 ct10.90 – 11.00 mm
5.00 – 5.20 ct11.10 – 11.20 mm
Newera Diamonds Contact us for any specific size requirement
Round Cut Melee Diamond Conversion of CT MM / MM to Carat And Sieve Size Chart
0.005 – 0.20 cts​
ROUND CUT SIEVE SIZESROUND CUT MM SIZECTS/PCSROUND CUT CARAT WEIGHT
+000/-00.90-1.10 mm1/2000.005 ct
+0/-11.10-1.15 mm1/1750.006 ct
+1/-1.51.15-1.20 mm1/1500.007 ct
+1.5/-21.20-1.25 mm1/1200.008 ct
+2/-2.51.25-1.30 mm1/1000.009 ct
+2.5/-3130-1.35 mm1/1000.01 ct
+3/-3.51.35-1.40 mm1/1000.011 ct
+3.5/-41.40-1.45 mm1/800.012 ct
+4/-4.51.45-1.50 mm1/800.013 ct
+4.5/-51.50-1.55 mm1/700.014 ct
+5/-5.51.55-1.60 mm1/600.016 ct
+5.5/-61.60-1.70 mm1/500.018 ct
+6/-6.51.70-1.80 mm1/500.021 ct
+6.5/-71.80-1.90 mm1/400.025 ct
+7/-7.51.90-2.00 mm1/300.029 ct
+7.5/-82.00-2.10 mm1/300.035 ct
+8/-8.52.10-2.20 mm1/250.039 ct
+8.5/-92.20-2.30 mm1/250.044 ct
+9/-9.52.30-2.40 mm1/200.052 ct
+9.5/-102.40-2.50 mm1/200.058 ct
+10/-10.52.50-2.60 mm1/150.069 ct
+10.5/-112.60-2.70 mm1/150.074 ct
+11/-11.52.70-2.80 mm1/120.078 ct
+11.5/-122.80-2.90 mm1/120.086 ct
+12/-12.52.90-3.00 mm1/100.095 ct
+12.5/-133.00-3.10 mm1/100.108 ct
+13/-13.53.10-3.20 mm1/80.116 ct
+13.5/-143.20-3.30 mm1/80.13 ct
+14/-14.53.30-3.40 mm1/60.145 ct
+14.5/-153.40-3.50 mm1/60.155 ct
+15/-15.53.50-3.60 mm1/60.165 ct
+15.5/-15.753.60-3.70 mm1/50.19 ct
+15.75/-16.53.70-3.80 mm1/50.20 ct
NGD Diamonds Contact us for any specific size requirement

What is the Ideal Table and Depth for the Brilliant Round Cut Diamond?
 EXCELLENTVERY GOODGOOD
Table – %53% – 58%52% – 53%
or
58% – 60%		51%
or
61% – 64%
Depth – %59% – 62.3%58% – 58.9%
or
62.4% – 63.5%		57.5% – 57.9%
or
63.6% – 64.1%
Crown Angle34 – 34.932.1 – 33.9
or
35 – 35.9		30.1 – 32
or
36 – 37.9
Pavilion Depth – %42.8% – 43.2%42% – 42.7%
or
43.3% – 43.9%		41% – 41.9%
or
44% – 45.5%
Girdle ThicknessThinVery ThinVery Thin
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio0.99 – 1.010.98 – 1.01

Professional Princess Diamond Size Chart

Detailed Carat to MM / MM to Carat Princess Cut Diamond Size Chart

Princess Cut Diamond MM Size Chart / CT Conversion Chart
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0,11 ct.2.50 – 2.60 mm.
0.12 – 0.13 ct.2.70 – 2.80 mm.
0.14 – 0.17 ct.2.90 – 3.00 mm.
0.18 – 0.21 ct.3.10 – 3.20 mm.
0.22 – 0.24 ct.3.30 – 3.40 mm.
0.25 – 0.28 ct.3.50 – 3.60 mm.
0.30 – 0.35 ct.3.70 – 3.80 mm.
0.35 – 0.40 ct.3.90 – 4.00 mm.
0.40 – 0.45 ct.4.10 – 4.20 mm.
0.45 – 0.50 ct.4.30 – 4.40 mm.
0.55 – 0.60 ct.4.50 – 4.60 mm.
0.60 – 0.65 ct.4.70 – 4.80 mm.
0.70 – 0.75 ct.4.90 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.80 – 0.89 ct.5.10 – 5.30 mm.
0.90 – 0.98 ct.5.30 – 5.50 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.40 – 5.90 mm.
1.30 – 1.45 ct5.80 – 6.40 mm.
1.50 – 1.60 ct6.00 – 6.70 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.80 – 7.50 mm.
2.40 – 2.60 ct7.20 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.10 mm.
3.00 – 3.30 ct7.70 – 8.50 mm.
3.40 – 3.60 ct8.20 – 8.60 mm.
3.70 -3.90 ct8.30 – 8.70 mm.
4.00 – 4.20 ct8.40 – 9.10 mm.
4.40 – 4.70 ct9.00 – 9.60 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Princess Cut?
 EXCELLENTVERY GOODGOOD
Table – %67% – 72%

59% – 66%

or

73% – 75%

59% – 66%

or

73% – 75%

Depth – %64%75%

58% –

or

75.1% – 80%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio1.00 – 1.031.04 – 1.05

Professional Square Cushion Cut Diamond Size Chart

Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool

Cushion Cut MM to Carat Diamond Conversion Charts0.04 – 0.69 cts & 0.70 – 5.25 cts
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.11 -0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.80 – 3.90 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.20 – 4.40 mm.
0.50 – 0.55 ct.4.40 – 4.60 mm.
0.56 – 0.58 ct.4.60 – 4.80 mm.
0.60 – 0.69 ct.4.80 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.70 – 0.77 ct.5.00 – 5.20 mm.
0.80 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.50 mm.
1.30 – 1.45 ct6.10 – 6.90 mm.
1.50 – 1.60 ct6.40 – 7.10 mm.
1.65 – 1.80 ct6.60 – 7.30 mm.
2.00 – 2.30 ct7.00 – 7.80 mm.
2.40 – 2.60 ct7.70 – 8.30 mm.
2.70 – 2.90 ct8.00 – 8.50 mm.
3.00 – 3.30 ct8.10 – 8.70 mm.
3.40 – 3.60 ct8.40 – 8.90 mm.
3.70 -3.90 ct8.70 – 9.20 mm.
4.00 – 4.20 ct9.00 – 9.60 mm.
4.40 – 4.70 ct9.40 – 9.70 mm.
5.00 – 5.25 ct9.80 – 10.50 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Square Cushion Cut?
 EXCELLENTVERY GOODGOOD
Table – %61 %- 67%

58% – 60%

or

65% – 70%

56% – 57%

or

70% – 71%

Depth – %61% – 67%

58% – 60.9%

or

67.1% – 70%

56% – 57.9%

or

70.1% – 71%

Girdle Very ThinSlightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio1.00 – 1.031.04 – 1.05

Professional Square Cushion Cut Diamond Size Chart

Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool

Cushion Cut MM to Carat Diamond Conversion Charts
0.04 – 0.69 cts & 0.70 – 5.25 cts
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.11 -0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.80 – 3.90 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.20 – 4.40 mm.
0.50 – 0.55 ct.4.40 – 4.60 mm.
0.56 – 0.58 ct.4.60 – 4.80 mm.
0.60 – 0.69 ct.4.80 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.70 – 0.77 ct.5.00 – 5.20 mm.
0.80 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.50 mm.
1.30 – 1.45 ct6.10 – 6.90 mm.
1.50 – 1.60 ct6.40 – 7.10 mm.
1.65 – 1.80 ct6.60 – 7.30 mm.
2.00 – 2.30 ct7.00 – 7.80 mm.
2.40 – 2.60 ct7.70 – 8.30 mm.
2.70 – 2.90 ct8.00 – 8.50 mm.
3.00 – 3.30 ct8.10 – 8.70 mm.
3.40 – 3.60 ct8.40 – 8.90 mm.
3.70 -3.90 ct8.70 – 9.20 mm.
4.00 – 4.20 ct9.00 – 9.60 mm.
4.40 – 4.70 ct9.40 – 9.70 mm.
5.00 – 5.25 ct9.80 – 10.50 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Square Cushion Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 59.9%

or

70.1% – 74%

54% – 56.9%

or

74.1% – 78%

Girdle Very Thin toSlightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.20-1.30

1.15 – 1.25

or

1.29 – 1.35

1.10 – 1.15

or

1.36 – 1.40

Professional Oval Diamond Size Chart

Detailed Oval Cut Size Comparison From CT to MM / MM to CT by Gemologists

Oval Cut Diamond Conversion Tool From CT to MM / MM to CT
0.04 – 1.15 cts. & 1.20 to 1.15
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
0.04 – 0.07 ct2.50 – 3.40 mm.2.00 – 2.40 mm.
0.08 – 0.12 ct3.40 – 4.80 mm.2.40 – 3.00 mm.
0.13 – 0.17 ct3.90 – 4.40 mm.2.80 -3.10 mm.
0.18 – 0.22 ct4.10 – 4.60 mm.3.00 – 3.40 mm.
0.23 – 0.28 ct4.50 – 5.10 mm.3.30 – 3.60 mm.
0.30 – 0.37 ct4.90 – 5.60 mm.3.60 – 4.00 mm.
0.40 – 0.48 ct5.60 – 6.00 mm.4.00 – 4.40 mm.
0.50 – 0.58 ct5.90 – 6.30 mm.4.40 – 4.60 mm.
0.60 – 0.69 ct6.30 – 6.70 mm.4.60 – 4.80 mm.
0.70 -0.78 ct6.60 – 6.80 mm.4.80 – 5.20 mm.
0.80 – 0.88 ct6.90 – 7.30 mm.5.10 – 5.40 mm.
0.90 – 0.98 ct7.20 – 7.80 mm.5.20 – 5.50 mm.
1.00 – 1.15 ct7.90 – 8.20 mm.5.50 – 5.80 mm.
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
1.20 – 1.27 ct8.10 -8.30 mm.6.00 – 6.10 mm.
1.30 – 1.45 ct8.40 – 8.50 mm.6.00 – 6.20 mm.
1.50 – 1.60 ct8.50 – 8.80 mm.6.20 -6.40 mm.
1.65 – 1.80 ct8.90 – 9.60 mm.6.60 – 6.80 mm.
2.00 – 2.30 ct9.80 – 10.10 mm.7.10 – 7.30 mm.
2.40 – 2.60 ct10.30 -10.70 mm.7.50 – 7.80 mm.
2.70 – 2.90 ct10.70 – 11.00 mm.7.80 – 7.90 mm.
3.00 – 3.30 ct10.90 – 11.60 mm.8.00 – 8.40mm.
3.40 – 3.60 ct11.50 – 12.00 mm.8.40 – 8.70 mm.
3.70 -3.90 ct12.00 – 12.35 mm.8.80 – 8.90 mm.
4.00 – 4.20 ct12.25 – 12.50 mm.8.80 – 9.00 mm.
4.40 – 4.70 ct12.40 – 13.00 mm.9.00 – 9.30 mm.
5.00 – 5.25 ct13.00 – 13.60 mm.9.40 – 9.70 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Oval Cut?
Oval Cut Diamond Recommended Proportions Guide
 EXCELLENTVERY GOODGOOD
Table – %67% – 72%

59% – 66%

or

73% – 75%

59% – 66%

or

73% – 75%

Depth – %64%75%

58% – 63.9%

or

75.1% – 80%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 – 1.03

1.30 – 1.34

or

1.51 – 1.55

1.25 – 1.29

or

1.56 – 1.60

Professional Pear Shape Diamond Size Chart & Conversion Tool

Pear Cut Diamond Size Comparison Tool – CT to MM / MM to CT

0.4 – 1.15 cts & 1.10 – 5.25 cts
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
0.04 – 0.07 ct.3.30 – 3.70 mm.2.00 – 2.40 mm.
0.08 – 0.12 ct.3.60 – 4.20 mm.2.40 – 2.80 mm.
0.13 – 0.17 ct.4.10 – 4.80 mm.2.90 – 3.20 mm.
0.18 – 0.22 ct.4.70 – 5.20 mm.3.10 – 3.30 mm.
0.23 – 0.28 ct.5.10 – 5.80 mm.3.40 – 2.70 mm.
0.30 – 0.37 ct.5.70 – 6.10 mm.3.60 – 4.00 mm.
0.40 – 0.48 ct.6.10 – 6.60 mm.3.90 – 4.40 mm.
0.50 – 0.59 ct.6.50 – 7.30 mm.4.30 – 4.60 mm.
0.60 – 0.67 ct.6.80 – 7.40 mm.4.60 – 4.80 mm.
0.70 – 0.78 ct.7.30 – 8.00 mm.4.80 – 5.00 mm.
0.80 – 0.88 ct.8.00 – 8.40 mm.5.10 – 5.30 mm.
0.90 – 0.98 ct.8.20 – 8.50 mm.5.30 – 5.50 mm.
1.00 -1.15 ct.8.40 – 8.90 mm.5.60 – 5.80 mm.
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
1.20 – 1.27 ct9.00 – 9.50 mm.5.90 – 6.00 mm.
1.30 – 1.45 ct9.30 – 9.60 mm.6.10 – 6.20 mm.
1.50 – 1.60 ct9.70 – 10.20 mm.6.30 – 6.50 mm.
1.65 – 1.80 ct10.00 – 10.50 mm.6.50 – 6.70 mm.
2.00 – 2.30 ct10.70 – 11.50 mm.7.00 – 7.30 mm.
2.40 – 2.60 ct11.50 – 11.80 mm.7.40 – 7.70 mm.
2.70 – 2.90 ct11.70 – 12.30 mm.7.70 – 7.80 mm.
3.00 – 3.30 ct12.40 – 13.00 mm.8.00 – 8.20 mm.
3.40 – 3.60 ct12.70 – 13.40 mm.8.30 – 8.50 mm.
3.70 -3.90 ct13.30 – 13.70 mm.8.50 – 8.70 mm.
4.00 – 4.20 ct13.60 – 14.00 mm.8.70 – 8.90 mm.
4.40 – 4.70 ct14.00 – 14.30 mm.9.00 – 9.20 mm.
5.00 – 5.25 ct14.50 – 15.50 mm.9.30 – 9.70 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Pear Cut?
Recommended Proportions Guide
 EXCELLENTVERY GOODGOOD
Table – %53% – 63%

52% – 64%

or

64% – 65%

51%

or

66% – 68%

Depth – %58% – 62%

56% – 57.9%

or

62.1% – 66%

53% – 55.9%

or

66.1% – 71%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Pear Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.45 – 1.55

1.40 – 1.45

or

1.56 – 1.65

1.35 – 1.39

or

1.66 – 1.80

Professional Emerald Cut Diamond Size Chart

Emerald Shaped Diamond Size Comparison From CT to MM / MM to CT

Emerald Cut Diamond Conversion Charts From CT to MM / MM to CT
0.08 – 0.74 cts. & 0.74 – 5.25 cts
EMERALD CUT CARAT WEIGHTEMERALD CUT LENGTH MM SIZEEMERALD CUT WIDTH MM SIZE
0.08 – 0.11 ct.2.90 – 3.20 mm.2.10 – 2.30 mm.
0.12 – 0.14 ct.3.20 – 3.40 mm.2.30 – 2.50 mm.
0.13 – 0.15 ct.3.30 – 3.50 mm.2.30 – 2.70 mm.
0.14 – 0.16 ct.3.50 – 3.60 mm.2.60 – 2.80 mm.
0.16 – 0.17 ct.3.70 – 3.80 mm.2.70 – 2.80 mm.
0.18 – 0.21 ct.3.90 – 4.00 mm.2.70 – 2.90 mm.
0.22 – 0.24 ct.4.10 – 4.20 mm.2.90 – 3.10 mm.
0.25 – 0.28 ct.4.30 – 4.40 mm.3.10 – 3.30 mm.
0.30 – 0.34 ct.4.50 – 4.60 mm.3.20 – 3.40 mm.
0.35 – 0.38 ct.4.70 – 4.80 mm.3.40 – 3.50 mm.
0.40 – 0.44 ct.4.90 – 5.00 mm.3.50 – 3.60 mm.
0.45 – 0.48 ct.5.00 – 5.20 mm.3.60 – 3.80 mm.
0.50 – 0.53 ct.5.20 – 5.50 mm.3.80 – 4.00 mm.
0.54 – 0.57 ct.5.50 – 5.70 mm.4.00 – 4.20 mm.
0.60 – 0.68 ct.5.70 – 5.80 mm.4.00 – 4.30 mm.
0.70 – 0.74 ct.5.90 – 6.10 mm.4.20 – 4.50 mm.
EMERALD CUT CARAT WEIGHTEMERALD CUT LENGTH MM SIZEEMERALD CUT WIDTH MM SIZE
0.74 – 0.78 ct.6.10 – 6.20 mm.4.40 – 4.50 mm.
0.80 – 0.88 ct.6.30 – 6.50 mm.4.40 – 4.70 mm.
0.90 – 0.98 ct.6.50 – 6.70 mm.4.60 – 4.90 mm.
1.00 – 1.15 ct.6.80 – 7.00 mm.4.80 – 5.20 mm.
1.20 – 1.27 ct7.00 – 7.40 mm.5.10 – 5.3 mm.
1.30 – 1.45 ct7.20 – 7.60 mm.5.20 – 5.50 mm.
1.50 – 1.60 ct7.50 – 7.80 mm.5.40 – 5.60 mm.
1.65 – 1.80 ct7.70 – 8.20 mm.5.60 – 5.80 mm.
2.00 – 2.30 ct8.10 – 8.80 mm.6.00 – 6.40 mm.
2.40 – 2.60 ct8.80 – 9.40 mm.6.40 – 6.70 mm.
2.70 – 2.90 ct9.10 – 9.60 mm.6.60 – 6.80 mm.
3.00 – 3.30 ct9.40 – 10.00 mm.6.70 – 7.30 mm.
3.40 – 3.60 ct9.70 – 10.40 mm.7.20 – 7.40 mm.
3.70 -3.90 ct9.90 – 10.80 mm.7.30 – 7.50 mm.
4.00 – 4.20 ct10.30 – 10.80 mm.7.50 – 7.90 mm.
4.40 – 4.70 ct10.80 – 11.20 mm.7.90 – 8.10 mm.
5.00 – 5.25 ct11..20 – 11.80 mm.8.10 – 8.30 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Emerald Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 61%

or

68% – 72%

54% – 57%

or

73% – 74%

Depth – %60% – 67%

58% – 61%

or

67% – 70%

 
Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Emerald Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.35 – 1.50

1.30 – 1.40

or

1.50 – 1.60

1.25 – 1.26

or

1.59 – 1.70

Professional Asscher Cut Diamond Size Chart

Asscher Shaped Diamond Size Comparison From CT to MM and Vice Versa

Asscher Cut Diamond CT to MM / MM to CT Conversion Chart
0.04 – 0.75 cts & 0.80 – 5.25 ctscts
ASSCHER CUT CARAT WEIGHTASSCHER CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0,11 ct.2.50 – 2.60 mm.
0.12 – 0.13 ct.2.70 – 2.80 mm.
0.14 -0.17 ct.2.90 – 3.10 mm.
0.18 – 0.21 ct.3.20 – 3.30 mm.
0.22 – 0.24 ct.3.30 – 3.40 mm.
0.25 – 0.28 ct.3.50 – 3.70 mm.
0.30 – 0.35 ct.3.70 – 3.90 mm.
0.35 – 0.40 ct.3.90 – 4.00 mm.
0.40 – 0.45 ct.4.10 – 4.20 mm.
0.45 – 0.50 ct.4.30 – 4.40 mm.
0.55 – 0.60 ct.4.50 – 4.60 mm.
0.60 – 0.65 ct.4.70 – 4.80 mm.
0.70 – 0.75 ct.4.90 – 5.20 mm.
ASSCHER CUT CARAT WEIGHTASSCHER CUT MM SIZE
0.80 – 0.89 ct.5.20 – 5.30 mm.
0.90 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.50 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.20 mm.
1.30 – 1.45 ct6.10 – 6.50 mm.
1.50 – 1.60 ct6.20 – 6.60 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.90 – 7.50 mm.
2.40 – 2.60 ct7.40 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.20 mm.
3.00 – 3.30 ct7.80 – 8.50 mm.
3.40 – 3.60 ct8.30 – 8.70 mm.
3.70 -3.90 ct8.50 – 8.90 mm.
4.00 – 4.20 ct8.70 – 9.20 mm.
4.40 – 4.70 ct9.10 – 9.70 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Asscher Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the recommended Length to Width Ratio of an Asscher Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 to

1.03

1.04 – 1.05

Professional Square Radiant Cut Diamond Size Chart

Square Radiant Shaped Diamond Size Comparison Tool

Radiant Cut Diamond CT to MM / MM to CT Conversion Chart
0.04 – 0.77 cts & 0.80 – 5.25 cts
SQUARE RADIANT CUT CARAT WEIGHTSQUARE RADIANT CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.10 – 0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.90 – 4.00 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.30 – 4.40 mm.
0.50 – 0.55 ct.4.50 – 4.60 mm.
0.55 – 0.58 ct.4.70 – 4.80 mm.
0.60 – 0.68 ct.4.90 – 5.00 mm.
0.70 – 0.77 ct.5.00 – 5.20 mm.
SQUARE RADIANT CUT CARAT WEIGHTSQUARE RADIANT CUT MM SIZE
0.80 – 0.88 ct.5.10 – 5.30 mm.
0.90 – 0.98 ct.5.20 – 5.40 mm.
1.00 – 1.15 ct5.50 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.20 mm.
1.30 – 1.45 ct6.10 – 6.50 mm.
1.50 – 1.60 ct6.20 – 6.60 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.90 – 7.50 mm.
2.40 – 2.60 ct7.40 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.20 mm.
3.00 – 3.30 ct7.80 – 8.50 mm.
3.40 – 3.60 ct8.30 – 8.70 mm.
3.70 -3.90 ct8.50 – 8.90 mm.
4.00 – 4.20 ct8.70 – 9.20 mm.
4.40 – 4.70 ct9.10 – 9.70 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Radiant Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Length to Width Ratio of a Radiant Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 to1.031.04 – 1.05

Professional Rectangular Radiant Cut Diamond Size Chart

Realistic Rectangular Radiant Shaped Diamond Size Comparison from CT TO MM / MM to CT

Rectangular Radiant Cut Diamond CT to MM / MM to CT
0.09 – 0.98 cts
RECTANGULAR RADIANT CUT CARAT WEIGHTRECTANGULAR RADIANT CUT LENGTH MM SIZERECTANGULAR RADIANT CUT WIDTH MM SIZE
0.09 – 0.11 ct.2.90 – 3.10 mm.2.30 – 2.40 mm.
0.11 – 0.13 ct.3.20 – 3.40 mm.2.40 – 2.50 mm.
0.13 – 0.15 ct.3.30 – 3.50 mm.2.40 – 2.60 mm.
0.14 – 0.16 ct.3.50 – 3.60 mm.2.60 – 2.80 mm.
0.18 – 0.20 ct.3.70 – 3.80 mm.2.90 – 3.10 mm.
0.19 – 0.22 ct.3.90 – 4.00 mm.2.90 – 3.10 mm.
0.23 – 0.24 ct.4.10 – 4.20 mm.3.10 – 3.20 mm.
0.25 – 0.28 ct.4.30 – 4.40 mm.3.20 – 3.30 mm.
0.30 – 0.36 ct.4.40 – 4.50 mm.3.30 – 3.50 mm.
0.38 – 0.44 ct.4.70 – 4.80 mm.3.40 – 3.80 mm.
0.43 – 0.48 ct.4.90 – 5.00 mm.3.60 – 3.90 mm.
0.49 – 0.52 ct.5.00 – 5.20 mm.4.00 – 4.20 mm.
0.52 – 0.55 ct.5.20 – 5.40 mm.4.00 – 4.20 mm.
0.60 – 0.67 ct.5.40 – 5.60 mm.4.30 – 4.50 mm.
0.70 – 0.75 ct.5.60 – 5.70 mm.4.50 – 4.60 mm.
0.80 – 0.89 ct.5.70 – 6.00 mm.4.50 – 4.60 mm.
0.90 – 0.98 ct.6.10 – 6.40 mm.4.70 – 4.90 mm.
Newera Diamonds Contact us for any specific size requirement
Rectangular Radiant Cut Diamond CT to MM / MM to CT
1.00 – 5.25 cts
RECTANGULAR RADIANT CUT CARAT WEIGHTRECTANGULAR RADIANT CUT LENGTH MM SIZERECTANGULAR RADIANT CUT WIDTH MM SIZE
1.00 – 1.15 ct.6.50 – 6.80 mm.4.90 – 5.10 mm.
1.20 – 1.27 ct6.80 – 7.30 mm.5.40 – 5.70 mm.
1.30 – 1.45 ct7.00 – 7.40 mm.5.80 – 5.90 mm.
1.50 – 1.60 ct7.30 – 7.90 mm.5.80 – 6.20 mm.
1.65 – 1.80 ct7.50 – 8.10 mm.6.10 – 6.50 mm.
2.00 – 2.30 ct8.00 – 8.60 mm.6.40 – 6.80 mm.
2.40 – 2.60 ct8.50 – 9.00 mm.6.90 – 7.20 mm.
2.70 – 2.90 ct8.90 – 9.40 mm.7.10 – 7.30 mm.
3.00 – 3.30 ct9.20 – 9.80 mm.7.30 – 7.70 mm.
3.40 – 3.60 ct9.40 – 10.00 mm.7.60 – 7.90 mm.
3.70 -3.90 ct9.90 – 11.00 mm.8.00 – 8.40 mm.
4.00 – 4.20 ct10.00 – 11.00 mm.8.10 – 8.50 mm.
4.40 – 4.70 ct10.70 – 11.50 mm.8.40 – 8.70 mm.
5.00 – 5.25 ct11.00- 11.70 mm.8.70 – 9.10 mm.

What is the Ideal Diamond Depth and Table for the Rectangular Radiant Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 59.9%

or

70.1% – 74%

54% – 56.9%

or

74.1% – 78%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
Recommended Length to Width Ratio of Rectangular Radiant Shaped Diamonds?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.20-1.30

1.15 – 1.25

or

1.29 – 1.35

1.10 – 1.15

or

1.36 – 1.40

Professional Heart Diamond Size Chart & Conversion Tool

MM to CT / CT to MM Heart Shaped Diamond Size Comparison

How to Accurately Measure a Heart Shaped Diamond
Heart Shaped Diamond CT to MM / MM to Carat Conversion Charts
0.18-5.20 cts (Excellent Cut) & 0.17 – 2.20 cts (Good Cut)
HEART SHAPE CARAT WEIGHTHEART SHAPE MM SIZE (RATIO of 0.95 – 1.02) EXCELLENT CUT
0.18 – 0.21 ct.3.50 – 3.70 mm.
0.23 – 0.26 ct.3.80 – 4.10 mm.
0.27 – 0.29 ct.4.20 – 4.40 mm.
0.30 – 0.38 ct.4.50 – 4.70 mm.
0.40 – 0.45 ct.4.90 – 5.10 mm.
0.50 – 0.57 ct.5.20 – 5.50 mm.
0.60 – 0.65 ct.5.60 – 5.70 mm.
0.70 – 0.75 ct.5.80 – 6.10 mm.
0.80 – 0.85 ct.6.10 – 6.30 mm.
0.90 – 0.95 ct.6.20 – 6.50 mm.
1.00 – 1.10 ct.6.40 – 6.70 mm.
1.20 – 1.30 ct.7.00 – 7.40 mm.
1.50 – 1.60 ct.7.50 – 7.90 mm.
1.70 – 1.80 ct.8.00 – 8.20 mm.
2.00 – 2.20 ct.8.30 – 8.60 mm.
2.40 – 2.60 ct.8.40 – 8.90 mm.
2.70 – 2.85 ct.8.80 – 9.30 mm.
3.00 – 3.20 ct.9.30 – 9.80 mm.
3.40 – 3.60 ct.9.50 – 9.90 mm.
4.00 – 4.20 ct.9.80 – 10.00 mm.
4.40 – 4.60 ct.9.90 – 10.30mm.
5.00 – 5.20 ct.10.50 – 11.10 mm.
HEART SHAPE CARAT WEIGHTHEART SHAPE MM SIZE (RATIO of 0.90 – 1.05) VERY GOOD CUT
0.17 – 0.21 ct.3.30 – 3.70 mm.
0.23 – 0.26 ct.3.60 – 3.90 mm.
0.27 – 0.29 ct.4.00 – 4.30 mm.
0.30 – 0.38 ct.4.20 – 4.60 mm.
0.40 – 0.45 ct.4.60 – 4.90 mm.
0.50 – 0.57 ct.4.90 – 5.30 mm.
0.60 – 0.65 ct.5.30 – 5.70 mm.
0.70 – 0.75 ct.5.50 – 5.80 mm.
0.80 – 0.85 ct.5.80 – 6.00 mm.
0.90 – 0.95 ct.5.90 – 6.30 mm.
1.00 – 1.10 ct.6.10 – 6.50 mm.
1.20 – 1.30 ct.6.60 – 7.00 mm.
1.50 – 1.60 ct.7.10 – 8.50 mm.
1.70 – 1.80 ct.5.00 – 5.30 mm.
2.00 – 2.20 ct.7.90 – 8.20 mm.
2.40 – 2.60 ct.8.00 – 8.50 mm.
2.70 – 2.85 ct.8.40 – 9.00 mm
3.00 – 3.20 ct.8.90 – 9.30 mm.
3.40 – 3.60 ct.9.00 – 9.40 mm.
4.00 – 4.20 ct.9.30 – 9.50 mm.
4.40 – 4.60 ct.9.40 – 9.80 mm.
5.00 – 5.20 ct.9.80 – 10.80 mm.
Newera Diamonds Contact us for any specific size requirement

Recommended Dpeth and Table for Heart Shapes
 EXCELLENTVERY GOODGOOD
Table – %53% – 63%

52%

or

64% – 65%

51%

or

66% – 68%

Depth – %58% – 62%

56% – 57.9%

or

62.1% – 66%

53% – 55.9%

or

66.1% – 71%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Recommended Length to Width Ratio in Heart Cut Diamonds?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio0.95 – 1.02

0.89 – 0.94

or

1.03 – 1.05

0.83 – 0.87

or

1.06 – 1.10

Professional Marquise Diamond Size Chart

CT to MM / MM to CT Marquise Shaped Diamond Size Comparison Chart

Marquise Cut Diamond CT to MM / MM CT Conversion Shart
0.04 – 1.10 cts & 1.20 – 5.25 cts
MARQUISE CUT CARAT WEIGHTMARQUISE CUT LENGTH MM SIZEMARQUISE CUT WIDTH MM SIZE
0.04 – 0.07 ct.3.80 – 4.30 mm.1.80 – 2.10 mm.
0.08 – 0.12 ct.4.20 – 4.90 mm.2.20 – 2.60 mm.
0.13 – 0.17 ct.4.90 – 5.70 mm.2.50 – 2.90 mm.
0.18 – 0.22 ct.5.60 – 6.30 mm.2.90 – 3.30 mm.
0.23 – 0.28 ct.6.00 – 6.70 mm.3.10 – 3.40 mm.
0.30 – 0.37 ct.6.50 – 7.20 mm.3.40 – 3.70 mm.
0.40 – 0.48 ct.7.10 – 7.80 mm.3.70 – 4.20 mm.
0.50 – 0.59 ct.7.50 – 8.50 mm.4.00 – 4.30 mm.
0.60 – 0.67 ct.8.50 – 8.90 mm.4.20 – 4.50 mm.
0.70 – 0.78 ct.8.80 – 9.30 mm.4.40 – 4.70 mm.
0.80 – 0.88 ct.9.30 – 9.80 mm.4.70 – 4.80 mm.
0.90 – 0.98 ct.9.30 – 10.00 mm.4.80 – 5.10 mm.
1.00 -1.10 ct.9.80 – 11.00 mm.5.00 – 5.30 mm.
MARQUISE CUT CARAT WEIGHTMARQUISE CUT LENGTH MM SIZEMARQUISE CUT WIDTH MM SIZE
1.20 – 1.27 ct10.60 – 11.50 mm.5.30 – 5.50 mm.
1.30 – 1.45 ct11.30 – 12.00 mm.5.60 – 5.70 mm.
1.50 – 1.60 ct11.80 – 12.20 mm.5.80 – 6.00 mm.
1.65 – 1.80 ct12.30 – 12.50 mm.6.00 – 6.20 mm.
2.00 – 2.30 ct12.60 – 13.50 mm.6.30 – 6.50 mm.
2.40 – 2.60 ct13.60 – 14.40 mm.6.60 – 7.00 mm.
2.70 – 2.90 ct14.40 – 14.80 mm.7.00 – 7.40 mm.
3.00 – 3.30 ct14.60 – 15.30 mm.7.50 – 7.70 mm.
3.40 – 3.60 ct15.50 – 16.10 mm.7.70 – 7.90 mm.
3.70 -3.90 ct16.20 – 16.40 mm.8.00 – 8.20 mm.
4.00 – 4.20 ct16.40 – 16.80 mm.8.20 – 8.40 mm.
4.40 – 4.70 ct16.70 – 17.30 mm.8.30 – 8.50 mm.
5.00 – 5.25 ct17.40- 17.80 mm.8.60 – 9.20 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Marquise Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the recommended Length to Width Ratio of Marquise Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.85 – 2.00

1.75 – 1.84

or

2.01 – 2.15

1.65 – 1.74

or

2.16 – 2.30

Professional Baguette Diamond Size Chart

Baguette Shaped Diamond Size Comparison of CT to MM / MM to CT

Tapered Baguette MM Width
MM Length1.20 – 1.301.40 – 1.501.60 – 1.701.80 – 1.902.00 – 2.102.20 – 2.302.40 – 2.502.60 – 2.702.80 – 2.903.00 – 3.10
2.50 – 2.600.03 – 0.040.04 – 0.050.05 – 0.060.06 – 0.070.08 – 0.090.09 – 0.110.10 – 0.110.11 – 0.120.13 – 0.140.14 – 0.15
2.70 – 2.800.03 – 0.040.04 – 0.050.04 – 0.050.06 – 0.080.08 – 0.100.09 – 0.110.10 – 0.120.12 – 0.130.13 – 0.140.14 – 0.16
2.90 – 3.000.04 – 0.050.05 – 0.070.05 – 0.070.07 – 0.090.09 – 0.110.11 – 0.130.11 – 0.130.13 – 0.140.14 – 0.160.14 – 0.16
3.10 – 3.200.04 – 0.060.06 – 0.070.06 – 0.070.07 – 0.090.09 – 0.110.11 – 0.130.12 – 0.140.14 – 0.150.15 – 0.160.15 – 0.17
3.30 – 3.400.05 – 0.070.06 – 0.080.07 – 0.080.08 – 0.090.09- 0.110.10 – 0.120.13 – 0.140.14 – 0.160.16- 0.170.16- 0.18
3.50- 3.600.06- 0.07

0.07

– 0.08

0.08

– 0.09

0.09

– 0.10

0.10

– 0.11

0.11 – 0.120.14 – 0.150.15 – 0.170.15- 0.180.17- 0.18
3.70 – 3.800.06 – 0.070.07 – 0.080.08 – 0.090.10 – 0.110.10- 0.120.12 – 0.130.15 – 0.160.17 – 0.180.18- 0.200.19- 0.22
3.90 – 4.000.06 – 0.080.07 – 0.090.08 – 0.100.10- 0.120.12 – 0.140.13 – 0.150.17 – 0.180.18- 0.190.20- 0.220.21 – 0.24
4.10 – 4.200.06 – 0.080.07 – 0.090.08 – 0.100.11- 0.130.12 – 0.140.14 – 0.160.17 – 0.190.19- 0.210.21- 0.230.23 – 0.25
4.30 – 4.400.08 – 0.090.09 – 0.110.10 – 0.120.13 – 0.150.14 – 0.160.18 – 0.200.21 – 0.230.23 – 0.260.26 – 0.280.28 – 0.30
4.50 – 4.600.09 – 0.100.11 – 0.120.12 – 0.130.15 – 0.170.17 – 0.190.19 – 0.210.22 – 0.240.24 – 0.270.27 – 0.300.30 – 0.33
4.70
4.80		0.10
0.11		0.11
0.12		0.12
0.14		0.15
0.16		0.16
0.18		0.18
0.20		0.20
0.22		0.23
0.25		0.25
0.28		0.28
0.31
4.90
5.00		0.10
0.12		0.11
0.13		0.12
0.15		0.14
0.16		0.17
0.18		0.18
0.21		0.21
0.23		0.23
0.26		0.27
0.30		0.30
0.33
5.10
5.20		0.11
0.13		0.12
0.14		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.22		0.22
0.24		0.24
0.28		0.28
0.32		0.31
0.35
5.30
5.40		0.11
0.14		0.13
0.15		0.15
0.17		0.16
0.18		0.18
0.20		0.21
0.23		0.23
0.25		0.25
0.29		0.28
0.33		0.33
0.37
5.50
5.60		0.11
0.14		0.13
0.16		0.15
0.18		0.17
0.20		0.20
0.22		0.22
0.24		0.25
0.29		0.28
0.31		0.30
0.35		0.35
0.39

Professional Tapered Baguette Diamond Size Chart

Realistic CT to MM / MM to CT Tapered Baguette Size Comparison

Tapered Baguette MM Width
MM Length1.20
1.30		1.40
1.50		1.60
1.70		1.80
1.90		2.00
2.10		2.20
2.30		2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
2.50
2.60		0.02
0.03		0.03
0.04		0.04
0.05		0.05
0.06		0.07
0.07		0.07
0.08		0.08
0.09		0.09
0.10		0.11
0.11		0.11
0.12
2.70
2.80		0.02
0.03		0.03
0.04		0.04
0.05		0.05
0.07		0.07
0.08		0.08
0.09		0.08
0.10		0.10
0.11		0.10
0.11		0.11
0.13
2.90
3.00		0.03
0.04		0.04
0.06		0.05
0.06		0.06
0.07		0.07
0.09		0.09
0.10		0.09
0.11		0.11
0.11		0.11
0.13		0.11
0.13
3.10
3.20		0.03
0.05		0.04
0.06		0.05
0.06		0.06
0.07		0.07
0.09		0.09
0.11		0.10
0.11		0.11
0.12		0.12
0.12		0.12
0.14
3.30
3.40		0.04
0.06		0.05
0.07		0.06
0.07		0.06
0.07		0.07
0.09		0.08
0.10		0.11
0.11		0.11
0.13		0.13
0.14		0.13
0.15
3.50
3.60		0.05
0.06		0.06
0.07		0.06
0.07		0.07
0.08		0.08
0.09		0.09
0.11		0.11
0.12		0.12
0.14		0.12
0.14		0.14
0.15
3.70
3.80		0.05
0.06		0.06
0.07		0.07
0.08		0.08
0.09		0.10
0.10		0.11
0.12		0.12
0.13		0.14
0.15		0.16
0.16		0.16
0.18
3.90
4.00		0.05
0.07		0.06
0.07		0.07
0.08		0.08
0.10		0.10
0.11		0.11
0.12		0.14
0.15		0.15
0.16		0.16
0.18		0.17
0.20
4.10
4.20		0.05
0.07		0.06
0.07		0.07
0.08		0.09
0.11		0.10
0.11		0.14
0.15		0.16
0.17		0.17
0.19		0.19
0.21		0.21
0.23
4.30
4.40		0.07
0.07		0.07
0.09		0.08
0.10		0.11
0.13		0.12
0.15		0.15
0.17		0.17
0.19		0.19
0.21		0.21
0.23		0.23
0.25
4.50
4.60		0.07
0.08		0.08
0.10		0.09
0.11		0.11
0.12		0.14
0.16		0.16
0.17		0.18
0.20		0.20
0.22		0.22
0.25		0.23
0.27
4.70
4.80		0.08
0.09		0.09
0.10		0.10
0.11		0.12
0.13		0.15
0.16		0.16
0.19		0.19
0.21		0.21
0.23		0.23
0.25		0.25
0.27
4.90
5.00		0.08
0.10		0.09
0.11		0.10
0.12		0.11
0.13		0.14
0.17		0.17
0.19		0.19
0.22		0.22
0.25		0.25
0.27		0.27
0.30
5.10
5.20		0.09
0.11		0.10
0.11		0.11
0.12		0.12
0.14		0.14
0.16		0.16
0.18		0.18
0.19		0.20
0.23		0.23
0.26		0.25
0.29
5.30
5.40		0.09
0.11		0.11
0.12		0.12
0.14		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.21		0.21
0.24		0.23
0.27		0.27
0.30
5.50
5.60		0.09
0.11		0.11
0.13		0.12
0.15		0.14
0.16		0.16
0.18		0.18
0.20		0.21
0.24		0.23
0.25		0.25
0.29		0.29
0.32

Professional Carre Cut Diamond Size Chart

CT to MM and MM to Carat Carre Cut Size Comparison

Carre Cut Diamond Conversion Chart From CT to MM / MM to CT
0.05 – 1.05 cts
CARRE CUT CARAT WEIGHTCARRE CUT MM SIZE
0.05 – 0.06 ct.1.90 – 2.00 mm.
0.06 – 0.07 ct.2.10 – 2.20 mm.
0.08 – 0.09 ct.2.30 – 2.40 mm.
0.10 – 0.12 ct.2.50 – 2.60 mm.
0.13 – 0.14 ct.2.70 – 2.80 mm.
0.15 – 0.17 ct.2.90 – 3.00 mm.
0.18 – 0.21 ct.3.10 – 3.20 mm.
0,22 – 0.25 ct.3.30 – 3.40 mm.
0.25 – 0.29 ct.3.50 – 3.60 mm.
0,30 – 0.36 ct.3.70 – 3.80 mm.
0.37 – 0.42 ct.3.90 – 4.00 mm.
0.42 – 0.47 ct.4.10 – 4.20 mm.
0.47 – 0.53 ct.4.30 – 4.40 mm.
0.55 – 0.60 ct.4.50 – 4.60 mm.
0.60 – 0.65 ct.4.70 – 4.80 mm.
0.70 – 0.75 ct.4.90 – 5.00 mm.
0.80 – 0.85 ct.5.10 – 5.20 mm.
0.90 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.05 ct.5.50 – 5.60 mm.

Professional Trapezoid Cut Diamond Size Chart

CT TO MM / MM to CT Size Comparison Tool for Trapezoid Diamonds

Trapezoid Brilliant Cut Diamond Pairs Conversion 0.28 – 1.30 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.28 – 0.32 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.2.60 – 2.75 mm
0.31 – 0.35 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.2.60 – 2.75 mm
0.31 – 0.34 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.2.90 – 3.00 mm
0.38- 0.44 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.2.90 – 3.00 mm
0.32 – 0.37 ct tw4.10 – 4.20 mm.2.70 – 2.80 mm.3.10 – 3.20 mm
0.40 – 0.44 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.3.20 – 3.45 mm
0.38 – 0.44 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.3.30 – 3.50 mm
0.43 – 0.47 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.3.30 – 3.50 mm
0.40 – 0.44 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.3.60 – 3.90 mm
0.44 – 0.47 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.3.60 – 3.90 mm
0.40 – 0.45 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.3.90 – 4.10 mm
0.50 – 0.55 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.3.90 – 4.10 mm
0.58 – 0.64 ct tw4.90- 5.20 mm.3.20 – 3.30 mm.3.95 – 4.20 mm
0.55 – 0.64 ct tw5.40 – 5.60 mm.2.90 – 3.10 mm.4.30 – 4.50 mm
0.64 – 0.75 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.4.00 – 4.40 mm
0.58 – 0.75 ct tw5.90 – 6.20 mm.2.90 – 3.10 mm.4.70 – 5.00 mm
0.75 – 0.85 ct tw5.90 – 6.20 mm.3.30 – 3.50 mm.4.90 – 5.10 mm
0.80 – 1.00 ct tw5.90 – 6.20 mm.3.60 – 4.00 mm.4.50 – 4.80 mm
0.85 – 1.10 ct tw6.40 – 6.60 mm.3.80 – 4.20 mm.4.80 – 5.20 mm.
0.97 – 1.20 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.4.80 – 5.20 mm.
1.10 – 1.30 ct tw6.80 – 7.20 mm.4.00 – 4.30 mm.5.00 – 5.50 mm.
Trapezoid Brilliant Cut Diamond Pairs Conversion Chart 0.22 – 2.60 ctw With Sharper Angled Corners of 60 °

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.22 – 0.26 ct tw3.70 – 4.00 mm.2.50 – 2.70 mm.1.70 – 1.80 mm
0.26 – 0.30 ct tw4.00 – 4.50 mm.2.70 – 3.00 mm.1.85 – 2.00 mm
0.30 – 0.34 ct tw4.20 – 4.60 mm.2.85 – 3.15 mm.1.90 – 2.10 mm
0.36 – 0.38 ct tw4.40 – 4.70 mm.3.00 – 3.20 mm.2.00 – 2.15 mm
0.38 – 0.42 ct tw4.70 – 4.90 mm.3.15 – 3.30 mm.2.15 – 2.25 mm
0.42 – 0.46 ct tw4.90 – 5.20 mm.3.30 – 3.50 mm.2.25 – 2.40 mm
0.48 – 0.50 ct tw5.20 – 5.50 mm.3.50 – 3.75 mm.2.40 – 2.50 mm
0.52 – 0.58 ct tw5.50 – 5.70 mm.3.75 – 3.85 mm.2.50 – 2.60 mm
0.62 – 0.66 ct tw5.60 -5.90 mm.3.80 – 4.00 mm.2.60 – 2.70 mm
0.70 – 0.76 ct tw5.90 – 6.30 mm.4.00 – 4.25 mm.2.70 – 2.90 mm
0.78 – 0.80 ct tw6.20 – 6.50 mm.4.10 – 4.30 mm.2.85- 3.00 mm
0.84 – 0.92 ct tw6.40 – 6.70 mm.4.15 – 4.40 mm.2.95 – 3.10 mm
0.96 – 1.02 ct tw6.60 – 6.80 mm.4.15 – 4.40 mm.3.00 – 3.15 mm
1.06 – 1.14 ct tw6.80 – 7.30 mm.4.25- 4.60 mm.3.15 – 3.35 mm
1.24 – 1.38 ct tw7.20 – 7.50 mm.4.55 – 4.75 mm.3.30 – 3.45 mm.
1.40 – 1.54 ct tw7.40 – 7.70 mm.4.70 – 4.85 mm.3.40 – 3.55 mm.
1.58 – 1.72 ct tw7.60 – 8.10 mm.4.75 – 5.10 mm.3.50 – 3.70 mm.
1.76 – 2.00 ct tw8.00 – 8.70 mm.5.00 – 5.50 mm.3.70 – 4.00 mm.
2.10 – 2.60 ct tw8.40 – 9.40 mm5.25 – 5.80 mm.3.90 – 4.30 mm.
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.29 – 1.40 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.29 – 0.33 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.2.60 – 2.75 mm
0.32- 0.36 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.2.60 – 2.75 mm
0.32 – 0.35 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.2.90 – 3.00 mm
0.39- 0.45 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.2.90 – 3.00 mm
0.33 – 0.38 ct tw4.10 – 4.20 mm.2.70 – 2.80 mm.3.10 – 3.20 mm
0.41- 0.46 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.3.20 – 3.45 mm
0.39 – 0.45 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.3.30 – 3.50 mm
0.44 – 0.48 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.3.30 – 3.50 mm
0.41 – 0.45 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.3.60 – 3.90 mm
0.45 – 0.49 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.3.60 – 3.90 mm
0.41 – 0.47 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.3.90 – 4.10 mm
0.51 – 0.57 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.3.90 – 4.10 mm
0.59 – 0.66 ct tw4.90- 5.20 mm.3.20 – 3.30 mm.3.95 – 4.20 mm
0.57 – 0.67 ct tw5.40 – 5.60 mm.2.90 – 3.10 mm.4.30 – 4.50 mm
0.66 – 0.77 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.4.00 – 4.40 mm
0.60 – 0.78 ct tw5.90 – 6.20 mm.2.90 – 3.10 mm.4.70 – 5.00 mm
0.77 – 0.88 ct tw5.90 – 6.20 mm.3.30 – 3.50 mm.4.90 – 5.10 mm
0.80 – 1.10 ct tw5.90 – 6.20 mm.3.60 – 4.00 mm.4.50 – 4.80 mm
0.90 – 1.15 ct tw6.40 – 6.60 mm.3.80 – 4.20 mm.4.80 – 5.20 mm.
1.00 – 1.25 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.4.80 – 5.20 mm.
1.15 – 1.40 ct tw6.80 – 7.20 mm.4.00 – 4.30 mm.5.00 – 5.50 mm.
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.22 – 2.60 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.22 – 0.26 ct tw3.70 – 4.00 mm.2.50 – 2.70 mm.1.70 – 1.80 mm
0.26 – 0.30 ct tw4.00 – 4.50 mm.2.70 – 3.00 mm.1.85 – 2.00 mm
0.30 – 0.34 ct tw4.20 – 4.60 mm.2.85 – 3.15 mm.1.90 – 2.10 mm
0.36 – 0.38 ct tw4.40 – 4.70 mm.3.00 – 3.20 mm.2.00 – 2.15 mm
0.38 – 0.42 ct tw4.70 – 4.90 mm.3.15 – 3.30 mm.2.15 – 2.25 mm
0.42 – 0.46 ct tw4.90 – 5.20 mm.3.30 – 3.50 mm.2.25 – 2.40 mm
0.48 – 0.50 ct tw5.20 – 5.50 mm.3.50 – 3.75 mm.2.40 – 2.50 mm
0.52 – 0.58 ct tw5.50 – 5.70 mm.3.75 – 3.85 mm.2.50 – 2.60 mm
0.62 – 0.66 ct tw5.60 -5.90 mm.3.80 – 4.00 mm.2.60 – 2.70 mm
0.70 – 0.76 ct tw5.90 – 6.30 mm.4.00 – 4.25 mm.2.70 – 2.90 mm
0.78 – 0.80 ct tw6.20 – 6.50 mm.4.10 – 4.30 mm.2.85- 3.00 mm
0.84 – 0.92 ct tw6.40 – 6.70 mm.4.15 – 4.40 mm.2.95 – 3.10 mm
0.96 – 1.02 ct tw6.60 – 6.80 mm.4.15 – 4.40 mm.3.00 – 3.15 mm
1.06 – 1.14 ct tw6.80 – 7.30 mm.4.25- 4.60 mm.3.15 – 3.35 mm
1.24 – 1.38 ct tw7.20 – 7.50 mm.4.55 – 4.75 mm.3.30 – 3.45 mm.
1.40 – 1.54 ct tw7.40 – 7.70 mm.4.70 – 4.85 mm.3.40 – 3.55 mm.
1.58 – 1.72 ct tw7.60 – 8.10 mm.4.75 – 5.10 mm.3.50 – 3.70 mm.
1.76 – 2.00 ct tw8.00 – 8.70 mm.5.00 – 5.50 mm.3.70 – 4.00 mm.
2.10 – 2.60 ct tw8.40 – 9.40 mm5.25 – 5.80 mm.3.90 – 4.30 mm.

Professional Half Moon Cut Diamond Size Chart

MM to CT / CT TO MM Size Comparison Tool of Half Moon Shaped Diamonds

Half Moon Cut Diamond Conversion Charts From CT to MM / MM to CT
0.25 – 1.30 ctw
PAIR AVERAGE TOTAL WEIGHTHALF MOON LENGTH MM SIZEHALF MOON WIDTH MM SIZE
0.25 – 0.27 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.
0.28 – 0.32 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.
0.30 – 0.35 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.
0.36- 0.38 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.
0.30 – 0.33 ct tw4.20 – 4.10 mm.2.70 – 2.80 mm.
0.36 – 0.40 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.
0.36 – 0.39 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.
0.42 – 0.45 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.
0.38 – 0.43 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.
0.43 – 0.46 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.
0.39 – 0.44 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.
0.46 – 0.50 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.
0.53 – 0.57 ct tw4.90 – 5.20 mm.3.20 – 3.30 mm.
0.56 – 0.61 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.
0.70 – 0.80 ct tw5.90 – 6.20 mm.3.40 – 3.70 mm.
0.90 – 1.00 ct tw5.90 – 6.20 mm.3.80 – 4.20 mm.
0.95 – 1.20 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.
1.10 – 1.30 ct tw6.80 – 7.20 mm.4.20 – 4.50 mm.

Straight Bullet Cut Diamond Size Chart

Size Comparison Tool for Straight Bullet Shaped Diamonds

Straight Bullet MM Width
MM Length2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
3.90
4.00		0.15
0.16		0.16
0.17		0.18
0.19		0.18
0.21
4.10
4.20		0.15
0.17		0.17
0.18		0.18
0.20		0.20
0.22
4.30
4.40		0.16
0.18		0.18
0.20		0.20
0.23		0.23
0.25
4.50
4.60		0.17
0.18		0.19
0.21		0.21
0.24		0.24
0.26
4.70
4.80		0.18
0.19		0.20
0.22		0.22
0.25		0.25
0.27
4.90
5.00		0.18
0.20		0.20
0.23		0.24
0.26		0.26
0.29
5.10
5.20		0.19
0.20		0.21
0.25		0.25
0.27		0.27
0.31
5.30
5.40		0.20
0.22		0.22
0.26		0.25
0.29		0.29
0.33
5.50
5.60		0.22
0.26		0.25
0.27		0.26
0.31		0.31
0.34

Professional Tapered Bullet Cut Diamond Size Chart

Size Comparison Tool of Tapered Bullet Shaped Diamonds From CT to MM / MM to CT

Straight Bullet MM Width
MM Length2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
3.90
4.00		0.12
0.13		0.13
0.13		0.14
0.15		0.15
0.17
4.10
4.20		0.12
0.13		0.15
0.15		0.15
0.16		0.16
0.18
4.30
4.40		0.13
0.14		0.15
0.16		0.16
0.18		0.18
0.20
4.50
4.60		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.21
4.70
4.80		0.14
0.15		0.16
0.18		0.18
0.20		0.20
0.22
4.90
5.00		0.15
0.16		0.16
0.18		0.19
0.21		0.21
0.23
5.10
5.20		0.15
0.16		0.17
0.20		0.20
0.22		0.22
0.25
5.30
5.40		0.20
0.22		0.18
0.20		0.20
0.23		0.23
0.26
5.50
5.60		0.18
0.20		0.20
0.22		0.21
0.25		0.25
0.27

Professional Shield Cut Diamond Size Chart

Size Comparison Tool for Shieldt Shaped Diamonds From CT to MM / MM to CT

Shield Cut Diamond Conversion Chart 0.13 – 1.45 ctw
PAIR AVERAGE TOTALE WEIGHTLENGTH MM SIZEWIDTH MM SIZE
0.13 – 0.17 ct tw3.60 – 4.10 mm.3.20 – 2.90 mm.
0.18 – 0.22 ct tw4.20 – 4 .40 mm.3.60 – 4.00 mm.
0.23 – 0.27 ct tw4.30 – 5.10 mm.3.90 – 4.80 mm.
0.28 – 0.37 ct tw4.80 – 5.60 mm.4.20 – 5.00 mm.
0.38 – 0.47 ct tw5.20 – 5.80 mm.4.80 – 5.30 mm.
0.48 – 0.59 ct tw5.40- 6.00 mm.5.00 – 5.80 mm.
0.60 – 0.68 ct tw5.80 – 6.30 mm.5.40- 6.00 mm.
0.70- 0.78 ct tw6.20- 6.80 mm.6.10 – 6.80 mm.
0.80 – 0.89 ct tw6.70 – 7.40 mm.6.50 – 7.20 mm.
0.90 – 0.98 ct tw7.20 – 7.80 mm.6.30 – 7.30 mm.
1.00 – 1.10 ct tw7.60 – 8.50 mm.6.70 – 7.60 mm.
1.18 – 1.45 ct tw8.00 – 8.90 mm.7.20 – 8.10 mm.

Professional Trilliant Cut Diamond Size Chart

MM to CT / CT to MM Trilliant Shaped DIamond Size Comparison Tool

Trilliant Cut Diamond CT to MM / MM to CT Size Chart
Trillion Base to Point From CT to MM
0.04 – 0.69 cts & 0.70 – 5.25 cts
CARAT WEIGHTBASE TO POINT MM SIZE
0.03 – 0.04 ct.2.20 – 2.40 mm.
0.05 – 0.06 ct.2.50 – 2.80 mm.
0.07 – 0.08 ct.3.00 – 3.20 mm.
0.08 – 0.11 ct.3.10 – 3.30 mm.
0.13 – 0,15 ct.3.30 – 3.60 mm.
0.15 – 0.17 ct.3.60 – 4.10 mm.
0.17 – 0.19 ct.3.80 – 4.20 mm.
0.20 – 0.21 ct.4.00 – 4.30 mm.
0.22 – 0.24 ct.4.20 – 4.40 mm.
0.24 – 0.26 ct.4.40 – 4.70 mm.
0.27 – 0.28 ct.4.70 – 5.00 mm.
0.30 – 0.33 ct.5.00 – 5.10 mm.
0.35 – 0.38 ct.5.10 – 5.30 mm.
0.40 – 0.43 ct.5.30 – 5.70 mm.
0.44 – 0.46 ct.5.60 – 5.90 mm.
0.48 – 0.52 ct.5.70 – 6.00 mm.
0.55 – 0.58 ct.5.90 – 6.20 mm.
0.60 – 0.65 ct.6.10 – 6.60 mm.
0.70 – 0.78 ct.6.50 – 6.80 mm.
0.80 – 0.87 ct.6.70 – 6.90 mm.
0.90 – 0.98 ct.6.80 – 7.30 mm.
1.00 – 1.15 ct.7.20 – 7.80 mm
1.18 – 1.45 ct7.50 – 8.30 mm
CARAT WEIGHTBASE TO POINT MM SIZE
0.03 – 0.04 ct.2.40 – 2.60 mm.
0.05 – 0.06 ct.2.80 – 3.10 mm.
0.07 – 0.08 ct.3.20 – 3.50 mm.
0.08 – 0.11 ct.3.40 – 3.70 mm.
0.13 – 0,15 ct.3.70 – 4.00 mm.
0.15 – 0.17 ct.4.00 – 4.50 mm.
0.17 – 0.19 ct.4.20 – 4.60 mm.
0.20 – 0.21 ct.4.40 – 4.70 mm.
0.22 – 0.24 ct.4.70 – 4.90 mm.
0.24 – 0.26 ct.4.90 – 5.20 mm.
0.27 – 0.28 ct.5.20 – 5.50 mm.
0.30 – 0.33 ct.5.50 – 5.70 mm.
0.35 – 0.38 ct.5.60 -5.90 mm.
0.40 – 0.43 ct.5.90 – 6.30 mm.
0.44 – 0.46 ct.6.20 – 6.50 mm.
0.48 – 0.52 ct.6.40 – 6.70 mm.
0.55 – 0.58 ct.6.60 – 6.80 mm.
0.60 – 0.65 ct.6.80 – 7.30 mm.
0.70 – 0.78 ct.7.20 – 7.50 mm.
0.80 – 0.87 ct.7.40 – 7.70 mm.
0.90 – 0.98 ct.7.60 – 8.10 mm.
1.00 – 1.15 ct.8.00 – 8.70 mm.
1.18 – 1.45 ct8.40 – 9.40 mm
Newera Diamonds Contact us for any specific size requirement

Professional Size Conversion Chart for Calf Cut Diamonds

Calf Cut Diamond Conversion Chart – CT to MM / MM to CT

Cushion Cut MM to Carat Diamond Conversion Charts
0.12 – 1.38 cts​
CARAT WEIGHTTOP HORIZONTAL LENGTH MM SIZEVERTICAL WIDTH MM SIZE
0.12 – 0,14 ct.3.50 – 3.80 mm.3.20 – 3.40 mm.
0.14 – 0.16 ct.3.80 – 4.30 mm.3.40 – 3.80 mm.
0.16 – 0.18 ct.4.00 – 4.40 mm.3.60 – 3.90 mm.
0.19 – 0.20 ct.4.20 – 4.50 mm.3.70 – 4.00 mm.
0.21 – 0.23 ct.4.40 – 4.70 mm.4.00 – 4.20 mm.
0.23 – 0.25 ct.4.60 – 5.00 mm.4.20 – 4.40 mm.
0.26 – 0.27 ct.5.00 – 5.20 mm.4.40 – 4.70 mm.
0.29 – 0.31 ct.5.20 – 5.40 mm.4.70 – 4.90 mm.
0.33 – 0.36 ct.5.30 -5.60 mm.4.80 -5.00 mm.
0.38 – 0.41 ct.5.60 – 6.00 mm.5.00 – 5.40 mm
0.42 – 0.44 ct.5.90 – 6.20 mm.5.30 – 5.50 mm.
0.46 – 0.49 ct.6.10 – 6.30 mm.5.50 – 5.70 mm.
0.52 – 0.55 ct.6.30 – 6.40 mm.5.70 – 5.80 mm.
0.57 – 0.62 ct.6.40 – 6.90 mm.6.40 – 6.90 mm.
0.67 – 0.74 ct.6.90 – 7.10 mm.6.80 – 7.10 mm.
0.76 – 0.83 ct.7.00 – 7.30 mm.7.00 – 7.30 mm.
0.86 – 0.93 ct.7.20 – 7.70 mm.7.20 – 7.70 mm.
0.95 – 1.09 ct.7.60 – 8.20 mm.7.60 – 8.25 mm.
1.12 – 1.38 ct8.00 – 8.90 mm8.00 – 8.90 mm

Professional Size Conversion Chart for Calf Cut Diamonds

Calf Cut Diamond Conversion Chart – CT to MM / MM to CT

0.12 – 1.38 cts​​
CARAT WEIGHTTOP HORIZONTAL LENGTH MM SIZEVERTICAL WIDTH MM SIZE
0.12 – 0,14 ct.3.50 – 3.80 mm.3.20 – 3.40 mm.
0.14 – 0.16 ct.3.80 – 4.30 mm.3.40 – 3.80 mm.
0.16 – 0.18 ct.4.00 – 4.40 mm.3.60 – 3.90 mm.
0.19 – 0.20 ct.4.20 – 4.50 mm.3.70 – 4.00 mm.
0.21 – 0.23 ct.4.40 – 4.70 mm.4.00 – 4.20 mm.
0.23 – 0.25 ct.4.60 – 5.00 mm.4.20 – 4.40 mm.
0.26 – 0.27 ct.5.00 – 5.20 mm.4.40 – 4.70 mm.
0.29 – 0.31 ct.5.20 – 5.40 mm.4.70 – 4.90 mm.
0.33 – 0.36 ct.5.30 -5.60 mm.4.80 -5.00 mm.
0.38 – 0.41 ct.5.60 – 6.00 mm.5.00 – 5.40 mm
0.42 – 0.44 ct.5.90 – 6.20 mm.5.30 – 5.50 mm.
0.46 – 0.49 ct.6.10 – 6.30 mm.5.50 – 5.70 mm.
0.52 – 0.55 ct.6.30 – 6.40 mm.5.70 – 5.80 mm.
0.57 – 0.62 ct.6.40 – 6.90 mm.6.40 – 6.90 mm.
0.67 – 0.74 ct.6.90 – 7.10 mm.6.80 – 7.10 mm.
0.76 – 0.83 ct.7.00 – 7.30 mm.7.00 – 7.30 mm.
0.86 – 0.93 ct.7.20 – 7.70 mm.7.20 – 7.70 mm.
0.95 – 1.09 ct.7.60 – 8.20 mm.7.60 – 8.25 mm.
1.12 – 1.38 ct8.00 – 8.90 mm8.00 – 8.90 mm
Newera Diamonds Contact us for any specific size requirement

Professional Brilliant Round Cut Diamond Carat MM Conversion

MM to CT Round Cut Size Comparison Tool

Brilliant Round Cut Diamond Carat MM
0.21 – 5.20 cts
ROUND CUT CARAT WEIGHTROUND CUT MM SIZE
0.21 – 0.22 ct3.80 – 3.90mm
0.23 – 0.24 ct3.90 – 4.00mm
0.25 – 0.26 ct4.00 – 4.10mm
0.26 – 0.27 ct4.10 – 4.20mm
0.27- 0.28 ct4.20 – 0.43 mm
0.30 -0.36 ct4.40 – 4.50 mm
0.40 – 0.45 ct4.60 – 4.70 mm
0.46 – 0.48 ct4.90 – 5.00 mm
0.50 – 0.57 ct5.10 – 5.30 mm
0.60 – 0.67 ct5.40 – 5.60 mm
0.70 – 0.77 ct5.70 – 5.90 mm
0.80 – 0.85 ct6.00 – 6.10 mm
0.90 – 0.95 ct6.20 – 6.30 mm
1.00 – 1.10 ct6.40 – 6.60 mm
1.22 – 1.26 ct6.70 – 6.80 mm
1.28 – 1.30 ct6.90 – 7.10 mm
1.50 – 1.55 ct7.20 – 7.40 mm
1.67 – 1.80 ct7.50 – 7.90 mm
2.00 – 2.10 ct8.10 – 8.30 mm
2.40 – 2.60 ct8.50 – 8.80 mm
2.70 – 2.80 ct8.90 – 9.10 mm
3.00 – 3.10 ct9.20 – 9.40 mm
3.30 – 3.40 ct9.50 – 9.60 mm
3.50 – 3.70 ct6.70 – 7.80 mm
3.80 – 3.90 ct9.90 – 10.00 mm
4.00 – 4.10 ct10.10 – 10.20 mm
3.30 – 4.40 ct10.30 – 10.50 mm
4.50 – 4.60 ct10.60 – 10.70 mm
4.70 – 4.80 ct10.80 – 10.90 mm
4.90 – 4.99 ct10.90 – 11.00 mm
5.00 – 5.20 ct11.10 – 11.20 mm
Newera Diamonds Contact us for any specific size requirement
Round Cut Melee Diamond Conversion of CT MM / MM to Carat And Sieve Size Chart
0.005 – 0.20 cts​
ROUND CUT SIEVE SIZESROUND CUT MM SIZECTS/PCSROUND CUT CARAT WEIGHT
+000/-00.90-1.10 mm1/2000.005 ct
+0/-11.10-1.15 mm1/1750.006 ct
+1/-1.51.15-1.20 mm1/1500.007 ct
+1.5/-21.20-1.25 mm1/1200.008 ct
+2/-2.51.25-1.30 mm1/1000.009 ct
+2.5/-3130-1.35 mm1/1000.01 ct
+3/-3.51.35-1.40 mm1/1000.011 ct
+3.5/-41.40-1.45 mm1/800.012 ct
+4/-4.51.45-1.50 mm1/800.013 ct
+4.5/-51.50-1.55 mm1/700.014 ct
+5/-5.51.55-1.60 mm1/600.016 ct
+5.5/-61.60-1.70 mm1/500.018 ct
+6/-6.51.70-1.80 mm1/500.021 ct
+6.5/-71.80-1.90 mm1/400.025 ct
+7/-7.51.90-2.00 mm1/300.029 ct
+7.5/-82.00-2.10 mm1/300.035 ct
+8/-8.52.10-2.20 mm1/250.039 ct
+8.5/-92.20-2.30 mm1/250.044 ct
+9/-9.52.30-2.40 mm1/200.052 ct
+9.5/-102.40-2.50 mm1/200.058 ct
+10/-10.52.50-2.60 mm1/150.069 ct
+10.5/-112.60-2.70 mm1/150.074 ct
+11/-11.52.70-2.80 mm1/120.078 ct
+11.5/-122.80-2.90 mm1/120.086 ct
+12/-12.52.90-3.00 mm1/100.095 ct
+12.5/-133.00-3.10 mm1/100.108 ct
+13/-13.53.10-3.20 mm1/80.116 ct
+13.5/-143.20-3.30 mm1/80.13 ct
+14/-14.53.30-3.40 mm1/60.145 ct
+14.5/-153.40-3.50 mm1/60.155 ct
+15/-15.53.50-3.60 mm1/60.165 ct
+15.5/-15.753.60-3.70 mm1/50.19 ct
+15.75/-16.53.70-3.80 mm1/50.20 ct
NGD Diamonds Contact us for any specific size requirement

What is the Ideal Table and Depth for the Brilliant Round Cut Diamond?
 EXCELLENTVERY GOODGOOD
Table – %53% – 58%52% – 53%
or
58% – 60%		51%
or
61% – 64%
Depth – %59% – 62.3%58% – 58.9%
or
62.4% – 63.5%		57.5% – 57.9%
or
63.6% – 64.1%
Crown Angle34 – 34.932.1 – 33.9
or
35 – 35.9		30.1 – 32
or
36 – 37.9
Pavilion Depth – %42.8% – 43.2%42% – 42.7%
or
43.3% – 43.9%		41% – 41.9%
or
44% – 45.5%
Girdle ThicknessThinVery ThinVery Thin
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio0.99 – 1.010.98 – 1.01

Professional Princess Diamond Size Chart

Detailed Carat to MM / MM to Carat Princess Cut Diamond Size Chart

Princess Cut Diamond MM Size Chart / CT Conversion Chart
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0,11 ct.2.50 – 2.60 mm.
0.12 – 0.13 ct.2.70 – 2.80 mm.
0.14 – 0.17 ct.2.90 – 3.00 mm.
0.18 – 0.21 ct.3.10 – 3.20 mm.
0.22 – 0.24 ct.3.30 – 3.40 mm.
0.25 – 0.28 ct.3.50 – 3.60 mm.
0.30 – 0.35 ct.3.70 – 3.80 mm.
0.35 – 0.40 ct.3.90 – 4.00 mm.
0.40 – 0.45 ct.4.10 – 4.20 mm.
0.45 – 0.50 ct.4.30 – 4.40 mm.
0.55 – 0.60 ct.4.50 – 4.60 mm.
0.60 – 0.65 ct.4.70 – 4.80 mm.
0.70 – 0.75 ct.4.90 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.80 – 0.89 ct.5.10 – 5.30 mm.
0.90 – 0.98 ct.5.30 – 5.50 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.40 – 5.90 mm.
1.30 – 1.45 ct5.80 – 6.40 mm.
1.50 – 1.60 ct6.00 – 6.70 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.80 – 7.50 mm.
2.40 – 2.60 ct7.20 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.10 mm.
3.00 – 3.30 ct7.70 – 8.50 mm.
3.40 – 3.60 ct8.20 – 8.60 mm.
3.70 -3.90 ct8.30 – 8.70 mm.
4.00 – 4.20 ct8.40 – 9.10 mm.
4.40 – 4.70 ct9.00 – 9.60 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Princess Cut?
 EXCELLENTVERY GOODGOOD
Table – %67% – 72%

59% – 66%

or

73% – 75%

59% – 66%

or

73% – 75%

Depth – %64%75%

58% –

or

75.1% – 80%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio1.00 – 1.031.04 – 1.05

Professional Square Cushion Cut Diamond Size Chart

Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool

Cushion Cut MM to Carat Diamond Conversion Charts0.04 – 0.69 cts & 0.70 – 5.25 cts
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.11 -0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.80 – 3.90 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.20 – 4.40 mm.
0.50 – 0.55 ct.4.40 – 4.60 mm.
0.56 – 0.58 ct.4.60 – 4.80 mm.
0.60 – 0.69 ct.4.80 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.70 – 0.77 ct.5.00 – 5.20 mm.
0.80 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.50 mm.
1.30 – 1.45 ct6.10 – 6.90 mm.
1.50 – 1.60 ct6.40 – 7.10 mm.
1.65 – 1.80 ct6.60 – 7.30 mm.
2.00 – 2.30 ct7.00 – 7.80 mm.
2.40 – 2.60 ct7.70 – 8.30 mm.
2.70 – 2.90 ct8.00 – 8.50 mm.
3.00 – 3.30 ct8.10 – 8.70 mm.
3.40 – 3.60 ct8.40 – 8.90 mm.
3.70 -3.90 ct8.70 – 9.20 mm.
4.00 – 4.20 ct9.00 – 9.60 mm.
4.40 – 4.70 ct9.40 – 9.70 mm.
5.00 – 5.25 ct9.80 – 10.50 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Square Cushion Cut?
 EXCELLENTVERY GOODGOOD
Table – %61 %- 67%

58% – 60%

or

65% – 70%

56% – 57%

or

70% – 71%

Depth – %61% – 67%

58% – 60.9%

or

67.1% – 70%

56% – 57.9%

or

70.1% – 71%

Girdle Very ThinSlightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODGOOD
Length To Width Ratio1.00 – 1.031.04 – 1.05

Professional Square Cushion Cut Diamond Size Chart

Carat to MM / MM to Carat Square Cushion Cut Diamond Size Comparison Tool

Cushion Cut MM to Carat Diamond Conversion Charts
0.04 – 0.69 cts & 0.70 – 5.25 cts
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.11 -0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.80 – 3.90 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.20 – 4.40 mm.
0.50 – 0.55 ct.4.40 – 4.60 mm.
0.56 – 0.58 ct.4.60 – 4.80 mm.
0.60 – 0.69 ct.4.80 – 5.00 mm.
PRINCESS CARAT WEIGHTPRINCESS CUT MM SIZE
0.70 – 0.77 ct.5.00 – 5.20 mm.
0.80 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.40 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.50 mm.
1.30 – 1.45 ct6.10 – 6.90 mm.
1.50 – 1.60 ct6.40 – 7.10 mm.
1.65 – 1.80 ct6.60 – 7.30 mm.
2.00 – 2.30 ct7.00 – 7.80 mm.
2.40 – 2.60 ct7.70 – 8.30 mm.
2.70 – 2.90 ct8.00 – 8.50 mm.
3.00 – 3.30 ct8.10 – 8.70 mm.
3.40 – 3.60 ct8.40 – 8.90 mm.
3.70 -3.90 ct8.70 – 9.20 mm.
4.00 – 4.20 ct9.00 – 9.60 mm.
4.40 – 4.70 ct9.40 – 9.70 mm.
5.00 – 5.25 ct9.80 – 10.50 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Square Cushion Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 59.9%

or

70.1% – 74%

54% – 56.9%

or

74.1% – 78%

Girdle Very Thin toSlightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.20-1.30

1.15 – 1.25

or

1.29 – 1.35

1.10 – 1.15

or

1.36 – 1.40

Professional Oval Diamond Size Chart

Detailed Oval Cut Size Comparison From CT to MM / MM to CT by Gemologists

Oval Cut Diamond Conversion Tool From CT to MM / MM to CT
0.04 – 1.15 cts. & 1.20 to 1.15
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
0.04 – 0.07 ct2.50 – 3.40 mm.2.00 – 2.40 mm.
0.08 – 0.12 ct3.40 – 4.80 mm.2.40 – 3.00 mm.
0.13 – 0.17 ct3.90 – 4.40 mm.2.80 -3.10 mm.
0.18 – 0.22 ct4.10 – 4.60 mm.3.00 – 3.40 mm.
0.23 – 0.28 ct4.50 – 5.10 mm.3.30 – 3.60 mm.
0.30 – 0.37 ct4.90 – 5.60 mm.3.60 – 4.00 mm.
0.40 – 0.48 ct5.60 – 6.00 mm.4.00 – 4.40 mm.
0.50 – 0.58 ct5.90 – 6.30 mm.4.40 – 4.60 mm.
0.60 – 0.69 ct6.30 – 6.70 mm.4.60 – 4.80 mm.
0.70 -0.78 ct6.60 – 6.80 mm.4.80 – 5.20 mm.
0.80 – 0.88 ct6.90 – 7.30 mm.5.10 – 5.40 mm.
0.90 – 0.98 ct7.20 – 7.80 mm.5.20 – 5.50 mm.
1.00 – 1.15 ct7.90 – 8.20 mm.5.50 – 5.80 mm.
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
1.20 – 1.27 ct8.10 -8.30 mm.6.00 – 6.10 mm.
1.30 – 1.45 ct8.40 – 8.50 mm.6.00 – 6.20 mm.
1.50 – 1.60 ct8.50 – 8.80 mm.6.20 -6.40 mm.
1.65 – 1.80 ct8.90 – 9.60 mm.6.60 – 6.80 mm.
2.00 – 2.30 ct9.80 – 10.10 mm.7.10 – 7.30 mm.
2.40 – 2.60 ct10.30 -10.70 mm.7.50 – 7.80 mm.
2.70 – 2.90 ct10.70 – 11.00 mm.7.80 – 7.90 mm.
3.00 – 3.30 ct10.90 – 11.60 mm.8.00 – 8.40mm.
3.40 – 3.60 ct11.50 – 12.00 mm.8.40 – 8.70 mm.
3.70 -3.90 ct12.00 – 12.35 mm.8.80 – 8.90 mm.
4.00 – 4.20 ct12.25 – 12.50 mm.8.80 – 9.00 mm.
4.40 – 4.70 ct12.40 – 13.00 mm.9.00 – 9.30 mm.
5.00 – 5.25 ct13.00 – 13.60 mm.9.40 – 9.70 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Oval Cut?
Oval Cut Diamond Recommended Proportions Guide
 EXCELLENTVERY GOODGOOD
Table – %67% – 72%

59% – 66%

or

73% – 75%

59% – 66%

or

73% – 75%

Depth – %64%75%

58% – 63.9%

or

75.1% – 80%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Brilliant Round Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 – 1.03

1.30 – 1.34

or

1.51 – 1.55

1.25 – 1.29

or

1.56 – 1.60

Professional Pear Shape Diamond Size Chart & Conversion Tool

Pear Cut Diamond Size Comparison Tool – CT to MM / MM to CT

0.4 – 1.15 cts & 1.10 – 5.25 cts
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
0.04 – 0.07 ct.3.30 – 3.70 mm.2.00 – 2.40 mm.
0.08 – 0.12 ct.3.60 – 4.20 mm.2.40 – 2.80 mm.
0.13 – 0.17 ct.4.10 – 4.80 mm.2.90 – 3.20 mm.
0.18 – 0.22 ct.4.70 – 5.20 mm.3.10 – 3.30 mm.
0.23 – 0.28 ct.5.10 – 5.80 mm.3.40 – 2.70 mm.
0.30 – 0.37 ct.5.70 – 6.10 mm.3.60 – 4.00 mm.
0.40 – 0.48 ct.6.10 – 6.60 mm.3.90 – 4.40 mm.
0.50 – 0.59 ct.6.50 – 7.30 mm.4.30 – 4.60 mm.
0.60 – 0.67 ct.6.80 – 7.40 mm.4.60 – 4.80 mm.
0.70 – 0.78 ct.7.30 – 8.00 mm.4.80 – 5.00 mm.
0.80 – 0.88 ct.8.00 – 8.40 mm.5.10 – 5.30 mm.
0.90 – 0.98 ct.8.20 – 8.50 mm.5.30 – 5.50 mm.
1.00 -1.15 ct.8.40 – 8.90 mm.5.60 – 5.80 mm.
OVAL CUT CARAT WEIGHTOVAL CUT LENGTH MM SIZEOVAL CUT WIDTH MM SIZE
1.20 – 1.27 ct9.00 – 9.50 mm.5.90 – 6.00 mm.
1.30 – 1.45 ct9.30 – 9.60 mm.6.10 – 6.20 mm.
1.50 – 1.60 ct9.70 – 10.20 mm.6.30 – 6.50 mm.
1.65 – 1.80 ct10.00 – 10.50 mm.6.50 – 6.70 mm.
2.00 – 2.30 ct10.70 – 11.50 mm.7.00 – 7.30 mm.
2.40 – 2.60 ct11.50 – 11.80 mm.7.40 – 7.70 mm.
2.70 – 2.90 ct11.70 – 12.30 mm.7.70 – 7.80 mm.
3.00 – 3.30 ct12.40 – 13.00 mm.8.00 – 8.20 mm.
3.40 – 3.60 ct12.70 – 13.40 mm.8.30 – 8.50 mm.
3.70 -3.90 ct13.30 – 13.70 mm.8.50 – 8.70 mm.
4.00 – 4.20 ct13.60 – 14.00 mm.8.70 – 8.90 mm.
4.40 – 4.70 ct14.00 – 14.30 mm.9.00 – 9.20 mm.
5.00 – 5.25 ct14.50 – 15.50 mm.9.30 – 9.70 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Pear Cut?
Recommended Proportions Guide
 EXCELLENTVERY GOODGOOD
Table – %53% – 63%

52% – 64%

or

64% – 65%

51%

or

66% – 68%

Depth – %58% – 62%

56% – 57.9%

or

62.1% – 66%

53% – 55.9%

or

66.1% – 71%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Pear Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.45 – 1.55

1.40 – 1.45

or

1.56 – 1.65

1.35 – 1.39

or

1.66 – 1.80

Professional Emerald Cut Diamond Size Chart

Emerald Shaped Diamond Size Comparison From CT to MM / MM to CT

Emerald Cut Diamond Conversion Charts From CT to MM / MM to CT
0.08 – 0.74 cts. & 0.74 – 5.25 cts
EMERALD CUT CARAT WEIGHTEMERALD CUT LENGTH MM SIZEEMERALD CUT WIDTH MM SIZE
0.08 – 0.11 ct.2.90 – 3.20 mm.2.10 – 2.30 mm.
0.12 – 0.14 ct.3.20 – 3.40 mm.2.30 – 2.50 mm.
0.13 – 0.15 ct.3.30 – 3.50 mm.2.30 – 2.70 mm.
0.14 – 0.16 ct.3.50 – 3.60 mm.2.60 – 2.80 mm.
0.16 – 0.17 ct.3.70 – 3.80 mm.2.70 – 2.80 mm.
0.18 – 0.21 ct.3.90 – 4.00 mm.2.70 – 2.90 mm.
0.22 – 0.24 ct.4.10 – 4.20 mm.2.90 – 3.10 mm.
0.25 – 0.28 ct.4.30 – 4.40 mm.3.10 – 3.30 mm.
0.30 – 0.34 ct.4.50 – 4.60 mm.3.20 – 3.40 mm.
0.35 – 0.38 ct.4.70 – 4.80 mm.3.40 – 3.50 mm.
0.40 – 0.44 ct.4.90 – 5.00 mm.3.50 – 3.60 mm.
0.45 – 0.48 ct.5.00 – 5.20 mm.3.60 – 3.80 mm.
0.50 – 0.53 ct.5.20 – 5.50 mm.3.80 – 4.00 mm.
0.54 – 0.57 ct.5.50 – 5.70 mm.4.00 – 4.20 mm.
0.60 – 0.68 ct.5.70 – 5.80 mm.4.00 – 4.30 mm.
0.70 – 0.74 ct.5.90 – 6.10 mm.4.20 – 4.50 mm.
EMERALD CUT CARAT WEIGHTEMERALD CUT LENGTH MM SIZEEMERALD CUT WIDTH MM SIZE
0.74 – 0.78 ct.6.10 – 6.20 mm.4.40 – 4.50 mm.
0.80 – 0.88 ct.6.30 – 6.50 mm.4.40 – 4.70 mm.
0.90 – 0.98 ct.6.50 – 6.70 mm.4.60 – 4.90 mm.
1.00 – 1.15 ct.6.80 – 7.00 mm.4.80 – 5.20 mm.
1.20 – 1.27 ct7.00 – 7.40 mm.5.10 – 5.3 mm.
1.30 – 1.45 ct7.20 – 7.60 mm.5.20 – 5.50 mm.
1.50 – 1.60 ct7.50 – 7.80 mm.5.40 – 5.60 mm.
1.65 – 1.80 ct7.70 – 8.20 mm.5.60 – 5.80 mm.
2.00 – 2.30 ct8.10 – 8.80 mm.6.00 – 6.40 mm.
2.40 – 2.60 ct8.80 – 9.40 mm.6.40 – 6.70 mm.
2.70 – 2.90 ct9.10 – 9.60 mm.6.60 – 6.80 mm.
3.00 – 3.30 ct9.40 – 10.00 mm.6.70 – 7.30 mm.
3.40 – 3.60 ct9.70 – 10.40 mm.7.20 – 7.40 mm.
3.70 -3.90 ct9.90 – 10.80 mm.7.30 – 7.50 mm.
4.00 – 4.20 ct10.30 – 10.80 mm.7.50 – 7.90 mm.
4.40 – 4.70 ct10.80 – 11.20 mm.7.90 – 8.10 mm.
5.00 – 5.25 ct11..20 – 11.80 mm.8.10 – 8.30 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Emerald Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 61%

or

68% – 72%

54% – 57%

or

73% – 74%

Depth – %60% – 67%

58% – 61%

or

67% – 70%

 
Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Emerald Cut Diamond Length to Width Ratio?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.35 – 1.50

1.30 – 1.40

or

1.50 – 1.60

1.25 – 1.26

or

1.59 – 1.70

Professional Asscher Cut Diamond Size Chart

Asscher Shaped Diamond Size Comparison From CT to MM and Vice Versa

Asscher Cut Diamond CT to MM / MM to CT Conversion Chart
0.04 – 0.75 cts & 0.80 – 5.25 ctscts
ASSCHER CUT CARAT WEIGHTASSCHER CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0,11 ct.2.50 – 2.60 mm.
0.12 – 0.13 ct.2.70 – 2.80 mm.
0.14 -0.17 ct.2.90 – 3.10 mm.
0.18 – 0.21 ct.3.20 – 3.30 mm.
0.22 – 0.24 ct.3.30 – 3.40 mm.
0.25 – 0.28 ct.3.50 – 3.70 mm.
0.30 – 0.35 ct.3.70 – 3.90 mm.
0.35 – 0.40 ct.3.90 – 4.00 mm.
0.40 – 0.45 ct.4.10 – 4.20 mm.
0.45 – 0.50 ct.4.30 – 4.40 mm.
0.55 – 0.60 ct.4.50 – 4.60 mm.
0.60 – 0.65 ct.4.70 – 4.80 mm.
0.70 – 0.75 ct.4.90 – 5.20 mm.
ASSCHER CUT CARAT WEIGHTASSCHER CUT MM SIZE
0.80 – 0.89 ct.5.20 – 5.30 mm.
0.90 – 0.98 ct.5.30 – 5.40 mm.
1.00 – 1.15 ct5.50 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.20 mm.
1.30 – 1.45 ct6.10 – 6.50 mm.
1.50 – 1.60 ct6.20 – 6.60 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.90 – 7.50 mm.
2.40 – 2.60 ct7.40 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.20 mm.
3.00 – 3.30 ct7.80 – 8.50 mm.
3.40 – 3.60 ct8.30 – 8.70 mm.
3.70 -3.90 ct8.50 – 8.90 mm.
4.00 – 4.20 ct8.70 – 9.20 mm.
4.40 – 4.70 ct9.10 – 9.70 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Asscher Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the recommended Length to Width Ratio of an Asscher Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 to

1.03

1.04 – 1.05

Professional Square Radiant Cut Diamond Size Chart

Square Radiant Shaped Diamond Size Comparison Tool

Radiant Cut Diamond CT to MM / MM to CT Conversion Chart
0.04 – 0.77 cts & 0.80 – 5.25 cts
SQUARE RADIANT CUT CARAT WEIGHTSQUARE RADIANT CUT MM SIZE
0.04 – 0.05 ct.1.90 – 2.00 mm.
0.05 – 0.06 ct.2.10 – 2.20 mm.
0.07 – 0.08 ct.2.30 – 2.40 mm.
0.09 – 0.10 ct.2.50 – 2.60 mm.
0.10 – 0.12 ct.2.70 – 2.80 mm.
0.13 – 0.15 ct.2.90 – 3.00 mm.
0.16 – 0.18 ct.3.10 – 3.20 mm.
0.20 – 0.22 ct.3.20 – 3.40 mm.
0.23 – 0.26 ct.3.50 – 3.60 mm.
0.28 – 0.31 ct.3.70 – 3.80 mm.
0.32 – 0.35 ct.3.90 – 4.00 mm.
0.38 – 0.40 ct.4.10 – 4.20 mm.
0.43 – 0.47 ct.4.30 – 4.40 mm.
0.50 – 0.55 ct.4.50 – 4.60 mm.
0.55 – 0.58 ct.4.70 – 4.80 mm.
0.60 – 0.68 ct.4.90 – 5.00 mm.
0.70 – 0.77 ct.5.00 – 5.20 mm.
SQUARE RADIANT CUT CARAT WEIGHTSQUARE RADIANT CUT MM SIZE
0.80 – 0.88 ct.5.10 – 5.30 mm.
0.90 – 0.98 ct.5.20 – 5.40 mm.
1.00 – 1.15 ct5.50 – 5.60 mm.
1.20 – 1.27 ct5.70 – 6.20 mm.
1.30 – 1.45 ct6.10 – 6.50 mm.
1.50 – 1.60 ct6.20 – 6.60 mm.
1.65 – 1.80 ct6.50 – 7.00 mm.
2.00 – 2.30 ct6.90 – 7.50 mm.
2.40 – 2.60 ct7.40 – 7.90 mm.
2.70 – 2.90 ct7.50 – 8.20 mm.
3.00 – 3.30 ct7.80 – 8.50 mm.
3.40 – 3.60 ct8.30 – 8.70 mm.
3.70 -3.90 ct8.50 – 8.90 mm.
4.00 – 4.20 ct8.70 – 9.20 mm.
4.40 – 4.70 ct9.10 – 9.70 mm.
5.00 – 5.25 ct9.20 – 10.00 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Radiant Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Ideal Length to Width Ratio of a Radiant Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.00 to1.031.04 – 1.05

Professional Rectangular Radiant Cut Diamond Size Chart

Realistic Rectangular Radiant Shaped Diamond Size Comparison from CT TO MM / MM to CT

Rectangular Radiant Cut Diamond CT to MM / MM to CT
0.09 – 0.98 cts
RECTANGULAR RADIANT CUT CARAT WEIGHTRECTANGULAR RADIANT CUT LENGTH MM SIZERECTANGULAR RADIANT CUT WIDTH MM SIZE
0.09 – 0.11 ct.2.90 – 3.10 mm.2.30 – 2.40 mm.
0.11 – 0.13 ct.3.20 – 3.40 mm.2.40 – 2.50 mm.
0.13 – 0.15 ct.3.30 – 3.50 mm.2.40 – 2.60 mm.
0.14 – 0.16 ct.3.50 – 3.60 mm.2.60 – 2.80 mm.
0.18 – 0.20 ct.3.70 – 3.80 mm.2.90 – 3.10 mm.
0.19 – 0.22 ct.3.90 – 4.00 mm.2.90 – 3.10 mm.
0.23 – 0.24 ct.4.10 – 4.20 mm.3.10 – 3.20 mm.
0.25 – 0.28 ct.4.30 – 4.40 mm.3.20 – 3.30 mm.
0.30 – 0.36 ct.4.40 – 4.50 mm.3.30 – 3.50 mm.
0.38 – 0.44 ct.4.70 – 4.80 mm.3.40 – 3.80 mm.
0.43 – 0.48 ct.4.90 – 5.00 mm.3.60 – 3.90 mm.
0.49 – 0.52 ct.5.00 – 5.20 mm.4.00 – 4.20 mm.
0.52 – 0.55 ct.5.20 – 5.40 mm.4.00 – 4.20 mm.
0.60 – 0.67 ct.5.40 – 5.60 mm.4.30 – 4.50 mm.
0.70 – 0.75 ct.5.60 – 5.70 mm.4.50 – 4.60 mm.
0.80 – 0.89 ct.5.70 – 6.00 mm.4.50 – 4.60 mm.
0.90 – 0.98 ct.6.10 – 6.40 mm.4.70 – 4.90 mm.
Newera Diamonds Contact us for any specific size requirement
Rectangular Radiant Cut Diamond CT to MM / MM to CT
1.00 – 5.25 cts
RECTANGULAR RADIANT CUT CARAT WEIGHTRECTANGULAR RADIANT CUT LENGTH MM SIZERECTANGULAR RADIANT CUT WIDTH MM SIZE
1.00 – 1.15 ct.6.50 – 6.80 mm.4.90 – 5.10 mm.
1.20 – 1.27 ct6.80 – 7.30 mm.5.40 – 5.70 mm.
1.30 – 1.45 ct7.00 – 7.40 mm.5.80 – 5.90 mm.
1.50 – 1.60 ct7.30 – 7.90 mm.5.80 – 6.20 mm.
1.65 – 1.80 ct7.50 – 8.10 mm.6.10 – 6.50 mm.
2.00 – 2.30 ct8.00 – 8.60 mm.6.40 – 6.80 mm.
2.40 – 2.60 ct8.50 – 9.00 mm.6.90 – 7.20 mm.
2.70 – 2.90 ct8.90 – 9.40 mm.7.10 – 7.30 mm.
3.00 – 3.30 ct9.20 – 9.80 mm.7.30 – 7.70 mm.
3.40 – 3.60 ct9.40 – 10.00 mm.7.60 – 7.90 mm.
3.70 -3.90 ct9.90 – 11.00 mm.8.00 – 8.40 mm.
4.00 – 4.20 ct10.00 – 11.00 mm.8.10 – 8.50 mm.
4.40 – 4.70 ct10.70 – 11.50 mm.8.40 – 8.70 mm.
5.00 – 5.25 ct11.00- 11.70 mm.8.70 – 9.10 mm.

What is the Ideal Diamond Depth and Table for the Rectangular Radiant Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 59.9%

or

70.1% – 74%

54% – 56.9%

or

74.1% – 78%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
Recommended Length to Width Ratio of Rectangular Radiant Shaped Diamonds?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.20-1.30

1.15 – 1.25

or

1.29 – 1.35

1.10 – 1.15

or

1.36 – 1.40

Professional Heart Diamond Size Chart & Conversion Tool

MM to CT / CT to MM Heart Shaped Diamond Size Comparison

How to Accurately Measure a Heart Shaped Diamond
Heart Shaped Diamond CT to MM / MM to Carat Conversion Charts
0.18-5.20 cts (Excellent Cut) & 0.17 – 2.20 cts (Good Cut)
HEART SHAPE CARAT WEIGHTHEART SHAPE MM SIZE (RATIO of 0.95 – 1.02) EXCELLENT CUT
0.18 – 0.21 ct.3.50 – 3.70 mm.
0.23 – 0.26 ct.3.80 – 4.10 mm.
0.27 – 0.29 ct.4.20 – 4.40 mm.
0.30 – 0.38 ct.4.50 – 4.70 mm.
0.40 – 0.45 ct.4.90 – 5.10 mm.
0.50 – 0.57 ct.5.20 – 5.50 mm.
0.60 – 0.65 ct.5.60 – 5.70 mm.
0.70 – 0.75 ct.5.80 – 6.10 mm.
0.80 – 0.85 ct.6.10 – 6.30 mm.
0.90 – 0.95 ct.6.20 – 6.50 mm.
1.00 – 1.10 ct.6.40 – 6.70 mm.
1.20 – 1.30 ct.7.00 – 7.40 mm.
1.50 – 1.60 ct.7.50 – 7.90 mm.
1.70 – 1.80 ct.8.00 – 8.20 mm.
2.00 – 2.20 ct.8.30 – 8.60 mm.
2.40 – 2.60 ct.8.40 – 8.90 mm.
2.70 – 2.85 ct.8.80 – 9.30 mm.
3.00 – 3.20 ct.9.30 – 9.80 mm.
3.40 – 3.60 ct.9.50 – 9.90 mm.
4.00 – 4.20 ct.9.80 – 10.00 mm.
4.40 – 4.60 ct.9.90 – 10.30mm.
5.00 – 5.20 ct.10.50 – 11.10 mm.
HEART SHAPE CARAT WEIGHTHEART SHAPE MM SIZE (RATIO of 0.90 – 1.05) VERY GOOD CUT
0.17 – 0.21 ct.3.30 – 3.70 mm.
0.23 – 0.26 ct.3.60 – 3.90 mm.
0.27 – 0.29 ct.4.00 – 4.30 mm.
0.30 – 0.38 ct.4.20 – 4.60 mm.
0.40 – 0.45 ct.4.60 – 4.90 mm.
0.50 – 0.57 ct.4.90 – 5.30 mm.
0.60 – 0.65 ct.5.30 – 5.70 mm.
0.70 – 0.75 ct.5.50 – 5.80 mm.
0.80 – 0.85 ct.5.80 – 6.00 mm.
0.90 – 0.95 ct.5.90 – 6.30 mm.
1.00 – 1.10 ct.6.10 – 6.50 mm.
1.20 – 1.30 ct.6.60 – 7.00 mm.
1.50 – 1.60 ct.7.10 – 8.50 mm.
1.70 – 1.80 ct.5.00 – 5.30 mm.
2.00 – 2.20 ct.7.90 – 8.20 mm.
2.40 – 2.60 ct.8.00 – 8.50 mm.
2.70 – 2.85 ct.8.40 – 9.00 mm
3.00 – 3.20 ct.8.90 – 9.30 mm.
3.40 – 3.60 ct.9.00 – 9.40 mm.
4.00 – 4.20 ct.9.30 – 9.50 mm.
4.40 – 4.60 ct.9.40 – 9.80 mm.
5.00 – 5.20 ct.9.80 – 10.80 mm.
Newera Diamonds Contact us for any specific size requirement

Recommended Dpeth and Table for Heart Shapes
 EXCELLENTVERY GOODGOOD
Table – %53% – 63%

52%

or

64% – 65%

51%

or

66% – 68%

Depth – %58% – 62%

56% – 57.9%

or

62.1% – 66%

53% – 55.9%

or

66.1% – 71%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the Recommended Length to Width Ratio in Heart Cut Diamonds?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio0.95 – 1.02

0.89 – 0.94

or

1.03 – 1.05

0.83 – 0.87

or

1.06 – 1.10

Professional Marquise Diamond Size Chart

CT to MM / MM to CT Marquise Shaped Diamond Size Comparison Chart

Marquise Cut Diamond CT to MM / MM CT Conversion Shart
0.04 – 1.10 cts & 1.20 – 5.25 cts
MARQUISE CUT CARAT WEIGHTMARQUISE CUT LENGTH MM SIZEMARQUISE CUT WIDTH MM SIZE
0.04 – 0.07 ct.3.80 – 4.30 mm.1.80 – 2.10 mm.
0.08 – 0.12 ct.4.20 – 4.90 mm.2.20 – 2.60 mm.
0.13 – 0.17 ct.4.90 – 5.70 mm.2.50 – 2.90 mm.
0.18 – 0.22 ct.5.60 – 6.30 mm.2.90 – 3.30 mm.
0.23 – 0.28 ct.6.00 – 6.70 mm.3.10 – 3.40 mm.
0.30 – 0.37 ct.6.50 – 7.20 mm.3.40 – 3.70 mm.
0.40 – 0.48 ct.7.10 – 7.80 mm.3.70 – 4.20 mm.
0.50 – 0.59 ct.7.50 – 8.50 mm.4.00 – 4.30 mm.
0.60 – 0.67 ct.8.50 – 8.90 mm.4.20 – 4.50 mm.
0.70 – 0.78 ct.8.80 – 9.30 mm.4.40 – 4.70 mm.
0.80 – 0.88 ct.9.30 – 9.80 mm.4.70 – 4.80 mm.
0.90 – 0.98 ct.9.30 – 10.00 mm.4.80 – 5.10 mm.
1.00 -1.10 ct.9.80 – 11.00 mm.5.00 – 5.30 mm.
MARQUISE CUT CARAT WEIGHTMARQUISE CUT LENGTH MM SIZEMARQUISE CUT WIDTH MM SIZE
1.20 – 1.27 ct10.60 – 11.50 mm.5.30 – 5.50 mm.
1.30 – 1.45 ct11.30 – 12.00 mm.5.60 – 5.70 mm.
1.50 – 1.60 ct11.80 – 12.20 mm.5.80 – 6.00 mm.
1.65 – 1.80 ct12.30 – 12.50 mm.6.00 – 6.20 mm.
2.00 – 2.30 ct12.60 – 13.50 mm.6.30 – 6.50 mm.
2.40 – 2.60 ct13.60 – 14.40 mm.6.60 – 7.00 mm.
2.70 – 2.90 ct14.40 – 14.80 mm.7.00 – 7.40 mm.
3.00 – 3.30 ct14.60 – 15.30 mm.7.50 – 7.70 mm.
3.40 – 3.60 ct15.50 – 16.10 mm.7.70 – 7.90 mm.
3.70 -3.90 ct16.20 – 16.40 mm.8.00 – 8.20 mm.
4.00 – 4.20 ct16.40 – 16.80 mm.8.20 – 8.40 mm.
4.40 – 4.70 ct16.70 – 17.30 mm.8.30 – 8.50 mm.
5.00 – 5.25 ct17.40- 17.80 mm.8.60 – 9.20 mm.
Newera Diamonds Contact us for any specific size requirement

What is the Ideal Diamond Depth and Table for the Marquise Cut?
 EXCELLENTVERY GOODGOOD
Table – %61% – 69%

57% – 60%

or

70% – 72%

54% – 56%

or

73% – 74%

Depth – %61% – 67%

59% – 60.9%

or

67.1% – 70%

57% – 58.9%

or

70.1% – 74%

Girdle Very Thin to –Slightly Thick

Very Thin

to

Thick

CuletNoneVery SmallSmall
What is the recommended Length to Width Ratio of Marquise Cut Diamond?
 EXCELLENT / VERY GOODVERY GOODGOOD
Length To Width Ratio1.85 – 2.00

1.75 – 1.84

or

2.01 – 2.15

1.65 – 1.74

or

2.16 – 2.30

Professional Baguette Diamond Size Chart

Baguette Shaped Diamond Size Comparison of CT to MM / MM to CT

Tapered Baguette MM Width
MM Length1.20 – 1.301.40 – 1.501.60 – 1.701.80 – 1.902.00 – 2.102.20 – 2.302.40 – 2.502.60 – 2.702.80 – 2.903.00 – 3.10
2.50 – 2.600.03 – 0.040.04 – 0.050.05 – 0.060.06 – 0.070.08 – 0.090.09 – 0.110.10 – 0.110.11 – 0.120.13 – 0.140.14 – 0.15
2.70 – 2.800.03 – 0.040.04 – 0.050.04 – 0.050.06 – 0.080.08 – 0.100.09 – 0.110.10 – 0.120.12 – 0.130.13 – 0.140.14 – 0.16
2.90 – 3.000.04 – 0.050.05 – 0.070.05 – 0.070.07 – 0.090.09 – 0.110.11 – 0.130.11 – 0.130.13 – 0.140.14 – 0.160.14 – 0.16
3.10 – 3.200.04 – 0.060.06 – 0.070.06 – 0.070.07 – 0.090.09 – 0.110.11 – 0.130.12 – 0.140.14 – 0.150.15 – 0.160.15 – 0.17
3.30 – 3.400.05 – 0.070.06 – 0.080.07 – 0.080.08 – 0.090.09- 0.110.10 – 0.120.13 – 0.140.14 – 0.160.16- 0.170.16- 0.18
3.50- 3.600.06- 0.07

0.07

– 0.08

0.08

– 0.09

0.09

– 0.10

0.10

– 0.11

0.11 – 0.120.14 – 0.150.15 – 0.170.15- 0.180.17- 0.18
3.70 – 3.800.06 – 0.070.07 – 0.080.08 – 0.090.10 – 0.110.10- 0.120.12 – 0.130.15 – 0.160.17 – 0.180.18- 0.200.19- 0.22
3.90 – 4.000.06 – 0.080.07 – 0.090.08 – 0.100.10- 0.120.12 – 0.140.13 – 0.150.17 – 0.180.18- 0.190.20- 0.220.21 – 0.24
4.10 – 4.200.06 – 0.080.07 – 0.090.08 – 0.100.11- 0.130.12 – 0.140.14 – 0.160.17 – 0.190.19- 0.210.21- 0.230.23 – 0.25
4.30 – 4.400.08 – 0.090.09 – 0.110.10 – 0.120.13 – 0.150.14 – 0.160.18 – 0.200.21 – 0.230.23 – 0.260.26 – 0.280.28 – 0.30
4.50 – 4.600.09 – 0.100.11 – 0.120.12 – 0.130.15 – 0.170.17 – 0.190.19 – 0.210.22 – 0.240.24 – 0.270.27 – 0.300.30 – 0.33
4.70
4.80		0.10
0.11		0.11
0.12		0.12
0.14		0.15
0.16		0.16
0.18		0.18
0.20		0.20
0.22		0.23
0.25		0.25
0.28		0.28
0.31
4.90
5.00		0.10
0.12		0.11
0.13		0.12
0.15		0.14
0.16		0.17
0.18		0.18
0.21		0.21
0.23		0.23
0.26		0.27
0.30		0.30
0.33
5.10
5.20		0.11
0.13		0.12
0.14		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.22		0.22
0.24		0.24
0.28		0.28
0.32		0.31
0.35
5.30
5.40		0.11
0.14		0.13
0.15		0.15
0.17		0.16
0.18		0.18
0.20		0.21
0.23		0.23
0.25		0.25
0.29		0.28
0.33		0.33
0.37
5.50
5.60		0.11
0.14		0.13
0.16		0.15
0.18		0.17
0.20		0.20
0.22		0.22
0.24		0.25
0.29		0.28
0.31		0.30
0.35		0.35
0.39

Professional Tapered Baguette Diamond Size Chart

Realistic CT to MM / MM to CT Tapered Baguette Size Comparison

Tapered Baguette MM Width
MM Length1.20
1.30		1.40
1.50		1.60
1.70		1.80
1.90		2.00
2.10		2.20
2.30		2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
2.50
2.60		0.02
0.03		0.03
0.04		0.04
0.05		0.05
0.06		0.07
0.07		0.07
0.08		0.08
0.09		0.09
0.10		0.11
0.11		0.11
0.12
2.70
2.80		0.02
0.03		0.03
0.04		0.04
0.05		0.05
0.07		0.07
0.08		0.08
0.09		0.08
0.10		0.10
0.11		0.10
0.11		0.11
0.13
2.90
3.00		0.03
0.04		0.04
0.06		0.05
0.06		0.06
0.07		0.07
0.09		0.09
0.10		0.09
0.11		0.11
0.11		0.11
0.13		0.11
0.13
3.10
3.20		0.03
0.05		0.04
0.06		0.05
0.06		0.06
0.07		0.07
0.09		0.09
0.11		0.10
0.11		0.11
0.12		0.12
0.12		0.12
0.14
3.30
3.40		0.04
0.06		0.05
0.07		0.06
0.07		0.06
0.07		0.07
0.09		0.08
0.10		0.11
0.11		0.11
0.13		0.13
0.14		0.13
0.15
3.50
3.60		0.05
0.06		0.06
0.07		0.06
0.07		0.07
0.08		0.08
0.09		0.09
0.11		0.11
0.12		0.12
0.14		0.12
0.14		0.14
0.15
3.70
3.80		0.05
0.06		0.06
0.07		0.07
0.08		0.08
0.09		0.10
0.10		0.11
0.12		0.12
0.13		0.14
0.15		0.16
0.16		0.16
0.18
3.90
4.00		0.05
0.07		0.06
0.07		0.07
0.08		0.08
0.10		0.10
0.11		0.11
0.12		0.14
0.15		0.15
0.16		0.16
0.18		0.17
0.20
4.10
4.20		0.05
0.07		0.06
0.07		0.07
0.08		0.09
0.11		0.10
0.11		0.14
0.15		0.16
0.17		0.17
0.19		0.19
0.21		0.21
0.23
4.30
4.40		0.07
0.07		0.07
0.09		0.08
0.10		0.11
0.13		0.12
0.15		0.15
0.17		0.17
0.19		0.19
0.21		0.21
0.23		0.23
0.25
4.50
4.60		0.07
0.08		0.08
0.10		0.09
0.11		0.11
0.12		0.14
0.16		0.16
0.17		0.18
0.20		0.20
0.22		0.22
0.25		0.23
0.27
4.70
4.80		0.08
0.09		0.09
0.10		0.10
0.11		0.12
0.13		0.15
0.16		0.16
0.19		0.19
0.21		0.21
0.23		0.23
0.25		0.25
0.27
4.90
5.00		0.08
0.10		0.09
0.11		0.10
0.12		0.11
0.13		0.14
0.17		0.17
0.19		0.19
0.22		0.22
0.25		0.25
0.27		0.27
0.30
5.10
5.20		0.09
0.11		0.10
0.11		0.11
0.12		0.12
0.14		0.14
0.16		0.16
0.18		0.18
0.19		0.20
0.23		0.23
0.26		0.25
0.29
5.30
5.40		0.09
0.11		0.11
0.12		0.12
0.14		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.21		0.21
0.24		0.23
0.27		0.27
0.30
5.50
5.60		0.09
0.11		0.11
0.13		0.12
0.15		0.14
0.16		0.16
0.18		0.18
0.20		0.21
0.24		0.23
0.25		0.25
0.29		0.29
0.32

Professional Trapezoid Cut Diamond Size Chart

CT TO MM / MM to CT Size Comparison Tool for Trapezoid Diamonds

Trapezoid Brilliant Cut Diamond Pairs Conversion 0.28 – 1.30 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.28 – 0.32 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.2.60 – 2.75 mm
0.31 – 0.35 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.2.60 – 2.75 mm
0.31 – 0.34 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.2.90 – 3.00 mm
0.38- 0.44 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.2.90 – 3.00 mm
0.32 – 0.37 ct tw4.10 – 4.20 mm.2.70 – 2.80 mm.3.10 – 3.20 mm
0.40 – 0.44 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.3.20 – 3.45 mm
0.38 – 0.44 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.3.30 – 3.50 mm
0.43 – 0.47 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.3.30 – 3.50 mm
0.40 – 0.44 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.3.60 – 3.90 mm
0.44 – 0.47 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.3.60 – 3.90 mm
0.40 – 0.45 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.3.90 – 4.10 mm
0.50 – 0.55 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.3.90 – 4.10 mm
0.58 – 0.64 ct tw4.90- 5.20 mm.3.20 – 3.30 mm.3.95 – 4.20 mm
0.55 – 0.64 ct tw5.40 – 5.60 mm.2.90 – 3.10 mm.4.30 – 4.50 mm
0.64 – 0.75 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.4.00 – 4.40 mm
0.58 – 0.75 ct tw5.90 – 6.20 mm.2.90 – 3.10 mm.4.70 – 5.00 mm
0.75 – 0.85 ct tw5.90 – 6.20 mm.3.30 – 3.50 mm.4.90 – 5.10 mm
0.80 – 1.00 ct tw5.90 – 6.20 mm.3.60 – 4.00 mm.4.50 – 4.80 mm
0.85 – 1.10 ct tw6.40 – 6.60 mm.3.80 – 4.20 mm.4.80 – 5.20 mm.
0.97 – 1.20 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.4.80 – 5.20 mm.
1.10 – 1.30 ct tw6.80 – 7.20 mm.4.00 – 4.30 mm.5.00 – 5.50 mm.
Trapezoid Brilliant Cut Diamond Pairs Conversion Chart 0.22 – 2.60 ctw With Sharper Angled Corners of 60 °

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.22 – 0.26 ct tw3.70 – 4.00 mm.2.50 – 2.70 mm.1.70 – 1.80 mm
0.26 – 0.30 ct tw4.00 – 4.50 mm.2.70 – 3.00 mm.1.85 – 2.00 mm
0.30 – 0.34 ct tw4.20 – 4.60 mm.2.85 – 3.15 mm.1.90 – 2.10 mm
0.36 – 0.38 ct tw4.40 – 4.70 mm.3.00 – 3.20 mm.2.00 – 2.15 mm
0.38 – 0.42 ct tw4.70 – 4.90 mm.3.15 – 3.30 mm.2.15 – 2.25 mm
0.42 – 0.46 ct tw4.90 – 5.20 mm.3.30 – 3.50 mm.2.25 – 2.40 mm
0.48 – 0.50 ct tw5.20 – 5.50 mm.3.50 – 3.75 mm.2.40 – 2.50 mm
0.52 – 0.58 ct tw5.50 – 5.70 mm.3.75 – 3.85 mm.2.50 – 2.60 mm
0.62 – 0.66 ct tw5.60 -5.90 mm.3.80 – 4.00 mm.2.60 – 2.70 mm
0.70 – 0.76 ct tw5.90 – 6.30 mm.4.00 – 4.25 mm.2.70 – 2.90 mm
0.78 – 0.80 ct tw6.20 – 6.50 mm.4.10 – 4.30 mm.2.85- 3.00 mm
0.84 – 0.92 ct tw6.40 – 6.70 mm.4.15 – 4.40 mm.2.95 – 3.10 mm
0.96 – 1.02 ct tw6.60 – 6.80 mm.4.15 – 4.40 mm.3.00 – 3.15 mm
1.06 – 1.14 ct tw6.80 – 7.30 mm.4.25- 4.60 mm.3.15 – 3.35 mm
1.24 – 1.38 ct tw7.20 – 7.50 mm.4.55 – 4.75 mm.3.30 – 3.45 mm.
1.40 – 1.54 ct tw7.40 – 7.70 mm.4.70 – 4.85 mm.3.40 – 3.55 mm.
1.58 – 1.72 ct tw7.60 – 8.10 mm.4.75 – 5.10 mm.3.50 – 3.70 mm.
1.76 – 2.00 ct tw8.00 – 8.70 mm.5.00 – 5.50 mm.3.70 – 4.00 mm.
2.10 – 2.60 ct tw8.40 – 9.40 mm5.25 – 5.80 mm.3.90 – 4.30 mm.
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.29 – 1.40 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.29 – 0.33 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.2.60 – 2.75 mm
0.32- 0.36 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.2.60 – 2.75 mm
0.32 – 0.35 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.2.90 – 3.00 mm
0.39- 0.45 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.2.90 – 3.00 mm
0.33 – 0.38 ct tw4.10 – 4.20 mm.2.70 – 2.80 mm.3.10 – 3.20 mm
0.41- 0.46 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.3.20 – 3.45 mm
0.39 – 0.45 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.3.30 – 3.50 mm
0.44 – 0.48 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.3.30 – 3.50 mm
0.41 – 0.45 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.3.60 – 3.90 mm
0.45 – 0.49 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.3.60 – 3.90 mm
0.41 – 0.47 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.3.90 – 4.10 mm
0.51 – 0.57 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.3.90 – 4.10 mm
0.59 – 0.66 ct tw4.90- 5.20 mm.3.20 – 3.30 mm.3.95 – 4.20 mm
0.57 – 0.67 ct tw5.40 – 5.60 mm.2.90 – 3.10 mm.4.30 – 4.50 mm
0.66 – 0.77 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.4.00 – 4.40 mm
0.60 – 0.78 ct tw5.90 – 6.20 mm.2.90 – 3.10 mm.4.70 – 5.00 mm
0.77 – 0.88 ct tw5.90 – 6.20 mm.3.30 – 3.50 mm.4.90 – 5.10 mm
0.80 – 1.10 ct tw5.90 – 6.20 mm.3.60 – 4.00 mm.4.50 – 4.80 mm
0.90 – 1.15 ct tw6.40 – 6.60 mm.3.80 – 4.20 mm.4.80 – 5.20 mm.
1.00 – 1.25 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.4.80 – 5.20 mm.
1.15 – 1.40 ct tw6.80 – 7.20 mm.4.00 – 4.30 mm.5.00 – 5.50 mm.
Trapezoid Step Cut Diamond Pairs Conversion Chart 0.22 – 2.60 ctw

Pair Average Total WeightTop Horizontal Length MM Size – (L-1)Vertical Width MM Size – (W-1)Bottom Horizontal Length MM Size – (L-2)
0.22 – 0.26 ct tw3.70 – 4.00 mm.2.50 – 2.70 mm.1.70 – 1.80 mm
0.26 – 0.30 ct tw4.00 – 4.50 mm.2.70 – 3.00 mm.1.85 – 2.00 mm
0.30 – 0.34 ct tw4.20 – 4.60 mm.2.85 – 3.15 mm.1.90 – 2.10 mm
0.36 – 0.38 ct tw4.40 – 4.70 mm.3.00 – 3.20 mm.2.00 – 2.15 mm
0.38 – 0.42 ct tw4.70 – 4.90 mm.3.15 – 3.30 mm.2.15 – 2.25 mm
0.42 – 0.46 ct tw4.90 – 5.20 mm.3.30 – 3.50 mm.2.25 – 2.40 mm
0.48 – 0.50 ct tw5.20 – 5.50 mm.3.50 – 3.75 mm.2.40 – 2.50 mm
0.52 – 0.58 ct tw5.50 – 5.70 mm.3.75 – 3.85 mm.2.50 – 2.60 mm
0.62 – 0.66 ct tw5.60 -5.90 mm.3.80 – 4.00 mm.2.60 – 2.70 mm
0.70 – 0.76 ct tw5.90 – 6.30 mm.4.00 – 4.25 mm.2.70 – 2.90 mm
0.78 – 0.80 ct tw6.20 – 6.50 mm.4.10 – 4.30 mm.2.85- 3.00 mm
0.84 – 0.92 ct tw6.40 – 6.70 mm.4.15 – 4.40 mm.2.95 – 3.10 mm
0.96 – 1.02 ct tw6.60 – 6.80 mm.4.15 – 4.40 mm.3.00 – 3.15 mm
1.06 – 1.14 ct tw6.80 – 7.30 mm.4.25- 4.60 mm.3.15 – 3.35 mm
1.24 – 1.38 ct tw7.20 – 7.50 mm.4.55 – 4.75 mm.3.30 – 3.45 mm.
1.40 – 1.54 ct tw7.40 – 7.70 mm.4.70 – 4.85 mm.3.40 – 3.55 mm.
1.58 – 1.72 ct tw7.60 – 8.10 mm.4.75 – 5.10 mm.3.50 – 3.70 mm.
1.76 – 2.00 ct tw8.00 – 8.70 mm.5.00 – 5.50 mm.3.70 – 4.00 mm.
2.10 – 2.60 ct tw8.40 – 9.40 mm5.25 – 5.80 mm.3.90 – 4.30 mm.

Professional Half Moon Cut Diamond Size Chart

MM to CT / CT TO MM Size Comparison Tool of Half Moon Shaped Diamonds

Half Moon Cut Diamond Conversion Charts From CT to MM / MM to CT
0.25 – 1.30 ctw
PAIR AVERAGE TOTAL WEIGHTHALF MOON LENGTH MM SIZEHALF MOON WIDTH MM SIZE
0.25 – 0.27 ct tw3.60 – 3 .80 mm.2.60 – 2.70 mm.
0.28 – 0.32 ct tw3.60 – 3 .80 mm.2.80 – 3.00 mm.
0.30 – 0.35 ct tw3.90 – 4.10 mm.2.70 – 2.80 mm.
0.36- 0.38 ct tw3.90 – 4.10 mm.2.90 – 3.10 mm.
0.30 – 0.33 ct tw4.20 – 4.10 mm.2.70 – 2.80 mm.
0.36 – 0.40 ct tw4.20- 4.30 mm.2.90 – 3.10 mm.
0.36 – 0.39 ct tw4.40 – 4.50 mm.2.70 – 2.80 mm.
0.42 – 0.45 ct tw4.40 – 4.50 mm.2.90 – 3.10 mm.
0.38 – 0.43 ct tw4.60 – 4.80 mm.2.70 – 2.80 mm.
0.43 – 0.46 ct tw4.60 – 4.80 mm.2.90 – 3.10 mm.
0.39 – 0.44 ct tw4.90 – 5.20 mm.2.70 – 2.80 mm.
0.46 – 0.50 ct tw4.90 – 5.20 mm.2.90 – 3.10 mm.
0.53 – 0.57 ct tw4.90 – 5.20 mm.3.20 – 3.30 mm.
0.56 – 0.61 ct tw5.40 – 5.60 mm.3.20 – 3.40 mm.
0.70 – 0.80 ct tw5.90 – 6.20 mm.3.40 – 3.70 mm.
0.90 – 1.00 ct tw5.90 – 6.20 mm.3.80 – 4.20 mm.
0.95 – 1.20 ct tw6.40 – 6.60 mm.4.00 – 4.30 mm.
1.10 – 1.30 ct tw6.80 – 7.20 mm.4.20 – 4.50 mm.

Straight Bullet Cut Diamond Size Chart

Size Comparison Tool for Straight Bullet Shaped Diamonds

Straight Bullet MM Width
MM Length2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
3.90
4.00		0.15
0.16		0.16
0.17		0.18
0.19		0.18
0.21
4.10
4.20		0.15
0.17		0.17
0.18		0.18
0.20		0.20
0.22
4.30
4.40		0.16
0.18		0.18
0.20		0.20
0.23		0.23
0.25
4.50
4.60		0.17
0.18		0.19
0.21		0.21
0.24		0.24
0.26
4.70
4.80		0.18
0.19		0.20
0.22		0.22
0.25		0.25
0.27
4.90
5.00		0.18
0.20		0.20
0.23		0.24
0.26		0.26
0.29
5.10
5.20		0.19
0.20		0.21
0.25		0.25
0.27		0.27
0.31
5.30
5.40		0.20
0.22		0.22
0.26		0.25
0.29		0.29
0.33
5.50
5.60		0.22
0.26		0.25
0.27		0.26
0.31		0.31
0.34

Professional Tapered Bullet Cut Diamond Size Chart

Size Comparison Tool of Tapered Bullet Shaped Diamonds From CT to MM / MM to CT

Straight Bullet MM Width
MM Length2.40
2.50		2.60
2.70		2.80
2.90		3.00
3.10
3.90
4.00		0.12
0.13		0.13
0.13		0.14
0.15		0.15
0.17
4.10
4.20		0.12
0.13		0.15
0.15		0.15
0.16		0.16
0.18
4.30
4.40		0.13
0.14		0.15
0.16		0.16
0.18		0.18
0.20
4.50
4.60		0.13
0.15		0.15
0.17		0.17
0.19		0.19
0.21
4.70
4.80		0.14
0.15		0.16
0.18		0.18
0.20		0.20
0.22
4.90
5.00		0.15
0.16		0.16
0.18		0.19
0.21		0.21
0.23
5.10
5.20		0.15
0.16		0.17
0.20		0.20
0.22		0.22
0.25
5.30
5.40		0.20
0.22		0.18
0.20		0.20
0.23		0.23
0.26
5.50
5.60		0.18
0.20		0.20
0.22		0.21
0.25		0.25
0.27

Professional Shield Cut Diamond Size Chart

Size Comparison Tool for Shieldt Shaped Diamonds From CT to MM / MM to CT

Shield Cut Diamond Conversion Chart 0.13 – 1.45 ctw
PAIR AVERAGE TOTALE WEIGHTLENGTH MM SIZEWIDTH MM SIZE
0.13 – 0.17 ct tw3.60 – 4.10 mm.3.20 – 2.90 mm.
0.18 – 0.22 ct tw4.20 – 4 .40 mm.3.60 – 4.00 mm.
0.23 – 0.27 ct tw4.30 – 5.10 mm.3.90 – 4.80 mm.
0.28 – 0.37 ct tw4.80 – 5.60 mm.4.20 – 5.00 mm.
0.38 – 0.47 ct tw5.20 – 5.80 mm.4.80 – 5.30 mm.
0.48 – 0.59 ct tw5.40- 6.00 mm.5.00 – 5.80 mm.
0.60 – 0.68 ct tw5.80 – 6.30 mm.5.40- 6.00 mm.
0.70- 0.78 ct tw6.20- 6.80 mm.6.10 – 6.80 mm.
0.80 – 0.89 ct tw6.70 – 7.40 mm.6.50 – 7.20 mm.
0.90 – 0.98 ct tw7.20 – 7.80 mm.6.30 – 7.30 mm.
1.00 – 1.10 ct tw7.60 – 8.50 mm.6.70 – 7.60 mm.
1.18 – 1.45 ct tw8.00 – 8.90 mm.7.20 – 8.10 mm.

Professional Trilliant Cut Diamond Size Chart

MM to CT / CT to MM Trilliant Shaped DIamond Size Comparison Tool

Trilliant Cut Diamond CT to MM / MM to CT Size Chart
Trillion Base to Point From CT to MM
0.04 – 0.69 cts & 0.70 – 5.25 cts
CARAT WEIGHTBASE TO POINT MM SIZE
0.03 – 0.04 ct.2.20 – 2.40 mm.
0.05 – 0.06 ct.2.50 – 2.80 mm.
0.07 – 0.08 ct.3.00 – 3.20 mm.
0.08 – 0.11 ct.3.10 – 3.30 mm.
0.13 – 0,15 ct.3.30 – 3.60 mm.
0.15 – 0.17 ct.3.60 – 4.10 mm.
0.17 – 0.19 ct.3.80 – 4.20 mm.
0.20 – 0.21 ct.4.00 – 4.30 mm.
0.22 – 0.24 ct.4.20 – 4.40 mm.
0.24 – 0.26 ct.4.40 – 4.70 mm.
0.27 – 0.28 ct.4.70 – 5.00 mm.
0.30 – 0.33 ct.5.00 – 5.10 mm.
0.35 – 0.38 ct.5.10 – 5.30 mm.
0.40 – 0.43 ct.5.30 – 5.70 mm.
0.44 – 0.46 ct.5.60 – 5.90 mm.
0.48 – 0.52 ct.5.70 – 6.00 mm.
0.55 – 0.58 ct.5.90 – 6.20 mm.
0.60 – 0.65 ct.6.10 – 6.60 mm.
0.70 – 0.78 ct.6.50 – 6.80 mm.
0.80 – 0.87 ct.6.70 – 6.90 mm.
0.90 – 0.98 ct.6.80 – 7.30 mm.
1.00 – 1.15 ct.7.20 – 7.80 mm
1.18 – 1.45 ct7.50 – 8.30 mm
CARAT WEIGHTBASE TO POINT MM SIZE
0.03 – 0.04 ct.2.40 – 2.60 mm.
0.05 – 0.06 ct.2.80 – 3.10 mm.
0.07 – 0.08 ct.3.20 – 3.50 mm.
0.08 – 0.11 ct.3.40 – 3.70 mm.
0.13 – 0,15 ct.3.70 – 4.00 mm.
0.15 – 0.17 ct.4.00 – 4.50 mm.
0.17 – 0.19 ct.4.20 – 4.60 mm.
0.20 – 0.21 ct.4.40 – 4.70 mm.
0.22 – 0.24 ct.4.70 – 4.90 mm.
0.24 – 0.26 ct.4.90 – 5.20 mm.
0.27 – 0.28 ct.5.20 – 5.50 mm.
0.30 – 0.33 ct.5.50 – 5.70 mm.
0.35 – 0.38 ct.5.60 -5.90 mm.
0.40 – 0.43 ct.5.90 – 6.30 mm.
0.44 – 0.46 ct.6.20 – 6.50 mm.
0.48 – 0.52 ct.6.40 – 6.70 mm.
0.55 – 0.58 ct.6.60 – 6.80 mm.
0.60 – 0.65 ct.6.80 – 7.30 mm.
0.70 – 0.78 ct.7.20 – 7.50 mm.
0.80 – 0.87 ct.7.40 – 7.70 mm.
0.90 – 0.98 ct.7.60 – 8.10 mm.
1.00 – 1.15 ct.8.00 – 8.70 mm.
1.18 – 1.45 ct8.40 – 9.40 mm
Newera Diamonds Contact us for any specific size requirement

Professional Size Conversion Chart for Calf Cut Diamonds

Calf Cut Diamond Conversion Chart – CT to MM / MM to CT

Cushion Cut MM to Carat Diamond Conversion Charts
0.12 – 1.38 cts​
CARAT WEIGHTTOP HORIZONTAL LENGTH MM SIZEVERTICAL WIDTH MM SIZE
0.12 – 0,14 ct.3.50 – 3.80 mm.3.20 – 3.40 mm.
0.14 – 0.16 ct.3.80 – 4.30 mm.3.40 – 3.80 mm.
0.16 – 0.18 ct.4.00 – 4.40 mm.3.60 – 3.90 mm.
0.19 – 0.20 ct.4.20 – 4.50 mm.3.70 – 4.00 mm.
0.21 – 0.23 ct.4.40 – 4.70 mm.4.00 – 4.20 mm.
0.23 – 0.25 ct.4.60 – 5.00 mm.4.20 – 4.40 mm.
0.26 – 0.27 ct.5.00 – 5.20 mm.4.40 – 4.70 mm.
0.29 – 0.31 ct.5.20 – 5.40 mm.4.70 – 4.90 mm.
0.33 – 0.36 ct.5.30 -5.60 mm.4.80 -5.00 mm.
0.38 – 0.41 ct.5.60 – 6.00 mm.5.00 – 5.40 mm
0.42 – 0.44 ct.5.90 – 6.20 mm.5.30 – 5.50 mm.
0.46 – 0.49 ct.6.10 – 6.30 mm.5.50 – 5.70 mm.
0.52 – 0.55 ct.6.30 – 6.40 mm.5.70 – 5.80 mm.
0.57 – 0.62 ct.6.40 – 6.90 mm.6.40 – 6.90 mm.
0.67 – 0.74 ct.6.90 – 7.10 mm.6.80 – 7.10 mm.
0.76 – 0.83 ct.7.00 – 7.30 mm.7.00 – 7.30 mm.
0.86 – 0.93 ct.7.20 – 7.70 mm.7.20 – 7.70 mm.
0.95 – 1.09 ct.7.60 – 8.20 mm.7.60 – 8.25 mm.
1.12 – 1.38 ct8.00 – 8.90 mm8.00 – 8.90 mm

Professional Size Conversion Chart for Calf Cut Diamonds

Calf Cut Diamond Conversion Chart – CT to MM / MM to CT

0.12 – 1.38 cts​​
CARAT WEIGHTTOP HORIZONTAL LENGTH MM SIZEVERTICAL WIDTH MM SIZE
0.12 – 0,14 ct.3.50 – 3.80 mm.3.20 – 3.40 mm.
0.14 – 0.16 ct.3.80 – 4.30 mm.3.40 – 3.80 mm.
0.16 – 0.18 ct.4.00 – 4.40 mm.3.60 – 3.90 mm.
0.19 – 0.20 ct.4.20 – 4.50 mm.3.70 – 4.00 mm.
0.21 – 0.23 ct.4.40 – 4.70 mm.4.00 – 4.20 mm.
0.23 – 0.25 ct.4.60 – 5.00 mm.4.20 – 4.40 mm.
0.26 – 0.27 ct.5.00 – 5.20 mm.4.40 – 4.70 mm.
0.29 – 0.31 ct.5.20 – 5.40 mm.4.70 – 4.90 mm.
0.33 – 0.36 ct.5.30 -5.60 mm.4.80 -5.00 mm.
0.38 – 0.41 ct.5.60 – 6.00 mm.5.00 – 5.40 mm
0.42 – 0.44 ct.5.90 – 6.20 mm.5.30 – 5.50 mm.
0.46 – 0.49 ct.6.10 – 6.30 mm.5.50 – 5.70 mm.
0.52 – 0.55 ct.6.30 – 6.40 mm.5.70 – 5.80 mm.
0.57 – 0.62 ct.6.40 – 6.90 mm.6.40 – 6.90 mm.
0.67 – 0.74 ct.6.90 – 7.10 mm.6.80 – 7.10 mm.
0.76 – 0.83 ct.7.00 – 7.30 mm.7.00 – 7.30 mm.
0.86 – 0.93 ct.7.20 – 7.70 mm.7.20 – 7.70 mm.
0.95 – 1.09 ct.7.60 – 8.20 mm.7.60 – 8.25 mm.
1.12 – 1.38 ct8.00 – 8.90 mm8.00 – 8.90 mm
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