Professional Asscher Cut Diamond Size Chart

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

This guide was constructed to assist diamond professionals, as well as consumers that want to educate themselves in order to make an educated purchase or sale of their Asscher Cut Diamond. Ever wondered what a 5mm Asscher Cut weighs in Carats, or a 1 Carat in MM? Below you will find all that and much more.

The Asscher Cut Diamond comes in many forms, but its most commonly used and sought after shape is a classic square. While sharing many similarities with the Emerald Shaped Diamonds, the Asscher differs in a few unique ways. Larger facets, and cropped corners are a few of the reasons for its mesmerizing view from above that you may find yourself getting lost in.

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Asscher Cut Diamond CT to MM / MM to CT Conversion Chart

0.04 - 0.75 cts

ASSCHER CUT CARAT WEIGHT	ASSCHER 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.

Ava Diamonds

0.80 - 5.25 cts

ASSCHER CUT CARAT WEIGHT	ASSCHER 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 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.

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Asscher Cut Diamond on Hand

An Asscher cut diamond shows its distinctive personality best once it’s on the finger. The square shape with neatly clipped corners gives it a distinctive appeal with a clean octagonal outline. This gives it an elegant geometric look rather than the soft flow of rounded shapes.

When seen in person the step-cut facets create the signature hall-of-mirrors effect, sending large, sweeping reflections across the stone instead of scattered sparkles. Although Asscher Cut Diamonds tend to be deeper than many other cuts, the generous face-up size still delivers substantial presence, and many people note how the precise symmetry makes the diamond feel both bold and refined on the hand.

The following image provides a visualization of asscher cut diamonds on hand in multiple weights, from 0.75 to 3.00 carats to help you visualize this comfortably.

What are the Ideal Proportions of a Asscher Cut?

Asscher Shaped Diamonds are a handful when it comes to grading reports and the usual reliance people attribute to them. This is because Asscher Shapes have very independent rules to what enables them to be successful. Perhaps the most notable is the unique windmill structure of the shape which if done correctly, should be seen less and less as you head towards the center of the stone.

Below you will find useful guidelines to help you along the process in order to increase your chances of finding a great piece.

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

	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
Culet	None	Very Small	Small

What is the recommended Length to Width Ratio of an Asscher Cut Diamond?

Personal tastes vary, but generally speaking, chances are you want to opt for an Asscher Shaped Diamond that is more Square as opposed to rectangular, as that is the most sought after option. You will find that the closer the length to width ratio is to the 1.00 range, the more square, and the further away it leans towards being rectangular.

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