Princess Diamond Size Chart From CT to MM / MM to CT

Professional Princess Diamond Size Chart

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

Despite being a relatively new member in the history rich world of diamond manufacturing, the princess cut which was introduced in its modern form in 1981 is now the second most popular diamond shape in the world. Out of all square shapes, the princess has the best light dispersion, largely thanks to its four bevelled corners.

The following princess diamond size chart is a result of years of accumulations of data, and can help you find answers to some of the most common questions and calculations in a matter of seconds. For example, you will be able to find the accurate conversion of a 1.00 carat princess cut in mm, or the size in carats of a 5mm princess cut diamond, all in one place, easily, and quickly.

The charts covers a wide array of sizes, starting from as small as 0.04 cts, up to 5.25 cts.

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Princess Cut Diamond MM Size Chart / CT Conversion Chart

0.04 - 0.75 cts

PRINCESS CARAT WEIGHT	PRINCESS 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.

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0.80 - 5.25 cts

PRINCESS CARAT WEIGHT	PRINCESS 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 ct	5.40 - 5.60 mm.
1.20 - 1.27 ct	5.40 - 5.90 mm.
1.30 - 1.45 ct	5.80 - 6.40 mm.
1.50 - 1.60 ct	6.00 - 6.70 mm.
1.65 - 1.80 ct	6.50 - 7.00 mm.
2.00 - 2.30 ct	6.80 - 7.50 mm.
2.40 - 2.60 ct	7.20 - 7.90 mm.
2.70 - 2.90 ct	7.50 - 8.10 mm.
3.00 - 3.30 ct	7.70 - 8.50 mm.
3.40 - 3.60 ct	8.20 - 8.60 mm.
3.70 -3.90 ct	8.30 - 8.70 mm.
4.00 - 4.20 ct	8.40 - 9.10 mm.
4.40 - 4.70 ct	9.00 - 9.60 mm.
5.00 - 5.25 ct	9.20 - 10.00 mm.

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What are the Ideal Proportions of a Princess Cut?

Princess Cuts are the most popular fancy diamonds in the world. However, experience and well thought of methods of ensuring their visual appeal and light performance are necessary due to the lack of official recognized standards of their cut grade. The ideal, or excellent dimensions of a Princess Cut Diamond are among the most important factors of what separates a great piece from a sub-par one. While the previous charts aid you in establishing various sizes in cts and mms, the following tables will provide a tremendous shortcut for finding princess cut diamonds that are the most likely to have a great light reflection.

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

	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 Princess Cut Diamond Length to Width Ratio?

When it comes to princess shaped diamonds, ideal length to width ratio can be a bit misleading. Why? because unlike brilliant round cuts for example which are more or less structured by strict facets and other measurements, the princess cut brings with it a lot more variations, which results in pieces that more square than others, while other lean more towards being rectangular.

While it’s a matter of personal preference, the more popular form of the princess, is its classic, recognizable square shape. The following length to width ratios represent achieving it in the most recommended level, which is most visible to the naked eye.

	EXCELLENT / VERY GOOD	GOOD
Length To Width Ratio	1.00 - 1.03	1.04 - 1.05