Want to see how an oval cut diamond looks on your hand at 1, 2, or more carats? You’re in the right place. We made the chart to give you an idea of how big oval cut diamonds are at different weights.

Oval Diamond Dimensions & Sizes

Length (mm)	Width (mm)	Oval Weight (ct)
4.5 mm.	3.5 mm.	0.21 ct.
5 mm.	3 mm.	0.21 ct.
5.5 mm.	3.5 mm.	0.33 ct.
5 mm.	4 mm.	0.35 ct.
6 mm.	4 mm.	0.50 ct.
6 mm.	5 mm.	0.61 ct.
6.5 mm.	4.5 mm.	0.65 ct.
7 mm.	5 mm.	0.75 ct.
7.7 mm.	5.7 mm.	1.00 ct.
8 mm.	6 mm.	1.25 ct.
9 mm.	6 mm.	1.41 ct.
8.5 mm.	6.5 mm.	1.50 ct.
9 mm.	7 mm.	2.00 ct.
10 mm.	8 mm.	2.50 ct.
10.5 mm.	8.5 mm.	2.88 ct.
12 mm.	8 mm.	3.00 ct.
11 mm.	9 mm.	3.85 ct.
12 mm.	10 mm.	5.05 ct.
14 mm.	10 mm.	5.81 ct.
13 mm.	11 mm.	6.05 ct.
14 mm.	12 mm.	8.21 ct.
15 mm.	12 mm.	8.76 ct.
16 mm.	12 mm.	9.32 ct.
16 mm.	14 mm.	11.88 ct.
18 mm.	13 mm.	12.86 ct.
20 mm.	15 mm.	14.96 ct.

What are an Oval Cut Diamond’s Dimensions?

An oval cut diamond is also known as oval brilliant. The elongated design creates the illusion of a large stone.

The thickness of an oval cut diamond is often a matter of personal taste, so it’s best to choose what appeals to you. Classic oval cuts have a length-to-width ratio of 1.25 - 1.65.

About the Oval Cut Diamond

Learn about Oval Cut Diamonds

Oval shaped diamonds have been around for centuries. The earliest ones date back to the 1300s. But the most famous oval cut diamond is the Koh-I-Noor. Early oval cut diamonds were basic and cut poorly to do the stones much justice. Diamond cutters of the time also did not have the tools and mathematical skills we have today.

In 1957, a Russian diamond cutter named Lazare Kaplan took the oval cut to a new height. He could turn unappealing rough stones into stunning diamonds. His cutting technique and process significantly improved the brilliance of the oval diamond. After more than six decades these cutting techniques are still being used today.

Maximising Your Oval Cut Diamond’s Size

If you want a diamond with the sparkle of a round brilliant but in a unique shape, an oval cut diamond is a great option. The slender shape will also make your finger appear longer, slimmer, and more feminine. With an oval cut, you’re likely to have a diamond that appears larger than other shapes of the same carat weight. As oval cuts conceal inclusions well, you can go as low as SI1, SI2 on the clarity scale.

However, oval cuts tend to display color slightly more than rounds. If you want a stone that looks reasonably white, pick from higher color grades. An “I” for white gold and platinum settings. A “J” if you’re setting your stone in yellow or rose gold setting.

FAQ

Why do oval diamonds look bigger?

The elongated shape covers more surface area or finger area compared to a round cut. So an oval cut appears bigger to the naked eye despite being the same carat weight.

Are oval engagement rings popular?

Yes. They are elegant and have the added advantage of making the finger appear long and slender. Also because they are less expensive per carat than round diamonds. And who wouldn’t want a ring that appears larger than it is?

Are oval diamonds less sparkly?

Not at all. Round and oval cuts both maximize brilliance and exude an amazing amount of sparkle. The wider surface area also spreads the sparkle across the stone more.

Oval Cut Diamond Size (Chart, Dimensions, On Hand)

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