Professional Marquise Diamond Size Chart

CT to MM / MM to CT Marquise Shaped Diamond Size Comparison Chart
0.04 - 5.25 cts
MARQUISE CUT CARAT WEIGHT MARQUISE CUT LENGTH MM SIZE MARQUISE 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.
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.
NGD Diamonds – Contact us for any specific size requirement

Ideal Proportions for Marquise Cut Diamonds

ParameterExcellentVery 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%
GirdleVery Thin to Slightly ThickVery Thin to ThickVery Thin to Thick
CuletNoneVery SmallSmall

What is the Recommended Length to Width Ratio of Marquise Cut Diamond?

Category Length to Width Ratio
Excellent 1.85 - 2.00
Very Good 1.75 - 1.84 or 2.01 - 2.15
Good 1.65 - 1.74 or 2.16 - 2.30