Professional Oval Diamond Size Chart

Oval Cut Diamond Conversion Tool From CT to MM / MM to CT

0.04 - 1.15 cts.

OVAL CUT CARAT WEIGHT	OVAL CUT LENGTH MM SIZE	OVAL CUT WIDTH MM SIZE
0.04 - 0.07 ct	2.50 - 3.40 mm.	2.00 - 2.40 mm.
0.08 - 0.12 ct	3.40 - 4.80 mm.	2.40 - 3.00 mm.
0.13 - 0.17 ct	3.90 - 4.40 mm.	2.80 -3.10 mm.
0.18 - 0.22 ct	4.10 - 4.60 mm.	3.00 - 3.40 mm.
0.23 - 0.28 ct	4.50 - 5.10 mm.	3.30 - 3.60 mm.
0.30 - 0.37 ct	4.90 - 5.60 mm.	3.60 - 4.00 mm.
0.40 - 0.48 ct	5.60 - 6.00 mm.	4.00 - 4.40 mm.
0.50 - 0.58 ct	5.90 - 6.30 mm.	4.40 - 4.60 mm.
0.60 - 0.69 ct	6.30 - 6.70 mm.	4.60 - 4.80 mm.
0.70 -0.78 ct	6.60 - 6.80 mm.	4.80 - 5.20 mm.
0.80 - 0.88 ct	6.90 - 7.30 mm.	5.10 - 5.40 mm.
0.90 - 0.98 ct	7.20 - 7.80 mm.	5.20 - 5.50 mm.
1.00 - 1.15 ct	7.90 - 8.20 mm.	5.50 - 5.80 mm.

Ava Diamonds

1.20 to 1.15

OVAL CUT CARAT WEIGHT	OVAL CUT LENGTH MM SIZE	OVAL CUT WIDTH MM SIZE
1.20 - 1.27 ct	8.10 -8.30 mm.	6.00 - 6.10 mm.
1.30 - 1.45 ct	8.40 - 8.50 mm.	6.00 - 6.20 mm.
1.50 - 1.60 ct	8.50 - 8.80 mm.	6.20 -6.40 mm.
1.65 - 1.80 ct	8.90 - 9.60 mm.	6.60 - 6.80 mm.
2.00 - 2.30 ct	9.80 - 10.10 mm.	7.10 - 7.30 mm.
2.40 - 2.60 ct	10.30 -10.70 mm.	7.50 - 7.80 mm.
2.70 - 2.90 ct	10.70 - 11.00 mm.	7.80 - 7.90 mm.
3.00 - 3.30 ct	10.90 - 11.60 mm.	8.00 - 8.40mm.
3.40 - 3.60 ct	11.50 - 12.00 mm.	8.40 - 8.70 mm.
3.70 -3.90 ct	12.00 - 12.35 mm.	8.80 - 8.90 mm.
4.00 - 4.20 ct	12.25 - 12.50 mm.	8.80 - 9.00 mm.
4.40 - 4.70 ct	12.40 - 13.00 mm.	9.00 - 9.30 mm.
5.00 - 5.25 ct	13.00 - 13.60 mm.	9.40 - 9.70 mm.

Ava Diamonds

What are the Ideal Proportions of an Oval Cut?

Like other fancy cuts, the Oval Shaped Diamond does not get graded by GIA. We’ve overcome this through personal experience in gemology and manufacturing, which has helped us establish our own guidelines to fil the gap and to ensure a method of differentiation between excellent cut oval diamonds and lower grades.

What is the Ideal Diamond Depth and Table for the Oval Cut?

Oval Cut Diamond Recommended Proportions Guide

	EXCELLENT	VERY GOOD	GOOD
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
Culet	None	Very Small	Small

What is the Ideal Oval Cut Diamond Length to Width Ratio?

The Length to Width Ratio if an Oval Cut Diamond is highly important factors. While personal tastes do play a factor in opting for a narrower or thicker stone for example, the following ratios are highly effective as a guideline to the most desirable oval shapes proportions and their recommended ratios.

	EXCELLENT	VERY GOOD	GOOD
Length To Width Ratio	1.00 - 1.03	1.30 - 1.34 or 1.51 - 1.55	1.25 - 1.29 or 1.56 - 1.60