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 - 5.25 cts

SQUARE RADIANT CUT CARAT WEIGHT	SQUARE 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.
0.80 - 0.88 ct.	5.10 - 5.30 mm.
0.90 - 0.98 ct.	5.20 - 5.40 mm.
1.00 - 1.15 ct	5.50 - 5.60 mm.
1.20 - 1.27 ct	5.70 - 6.20 mm.
1.30 - 1.45 ct	6.10 - 6.50 mm.
1.50 - 1.60 ct	6.20 - 6.60 mm.
1.65 - 1.80 ct	6.50 - 7.00 mm.
2.00 - 2.30 ct	6.90 - 7.50 mm.
2.40 - 2.60 ct	7.40 - 7.90 mm.
2.70 - 2.90 ct	7.50 - 8.20 mm.
3.00 - 3.30 ct	7.80 - 8.50 mm.
3.40 - 3.60 ct	8.30 - 8.70 mm.
3.70 -3.90 ct	8.50 - 8.90 mm.
4.00 - 4.20 ct	8.70 - 9.20 mm.
4.40 - 4.70 ct	9.10 - 9.70 mm.
5.00 - 5.25 ct	9.20 - 10.00 mm.

NGD Diamonds – Contact us for any specific size requirement

Ideal Proportions for Radiant Cut Diamonds

Parameter	Excellent	Very Good	Good
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	Very Thin to Thick
Culet	None	Very Small	Small

Category	Length to Width Ratio
Excellent	1.00 to 1.03
Very Good	1.04 - 1.05