Kobelli Cait Engagement Ring
mm to Carat Stone Size Chart
Cushion-cut

Regarded as the third popular cut of diamonds, cushion diamond stones have better fire and larger variance generated by 68 facets. Often referred to as the “pillow” or “candlelight” diamond cut, it is the vintage take of round cut diamonds but has a softer radiance with rounded corners. Our stone sizing chart below shows the standard sizes and matching carat weights for cushion-cut diamonds to help you find your perfect fit.

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Printable Size Chart

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Cushion Diamond Average Carat by Millimeter Conversions

One of the most unique stones on the market, as well as a Kobelli customer favorite, particularly on our halo rings, cushion cut stones are between a round brilliant, old mine and radiant, with rounded corners for a comfortable look and feel.

Cushion stones vary from elongated to squarish. Kobelli hand selects each of our cushion stones to best fit our designs for the most flattering outcome. | Shop Kobelli Cushion Wedding Jewelry.
Approx. Millimeter
Approx. Carat Weight
4.5
0.5
5.7
1
6.2
1.25
6.5
1.5
7.3
2
8
2.5
8.3
3
8.7
3.5
9
4
9.5
4.5
10
5
Round-shape diamond

Round

Cushion-shape diamond

Cushion

Oval-shape diamond

Oval

Marquise-shape diamond

Marquise
Pear-shape diamond

Pear

Emerald-shape diamond

Emerald

Radiant-shape diamond

Radiant

Asscher-shape diamond

Asscher

FAQ

How much does a listed carat weight vary by?

All diamond weights may vary by 5% unless stated otherwise. One-of-a-kind products will showcase the exact weight of all stones.

Do moissanites weigh the same as diamonds?

Not quite - while the moissanite gemstone is technically slightly lighter in weight due to a lower density, the stones are most commonly marketed by their Diamond Equivalent Weight (DEW) in accordance to the millimeter size of the stone rather than the weight of the stone itself.

All of Kobelli's moissanite products will be listed with the Diamond Equivalent Weights (DEW). This allows for an identical dimensional look if you are to upgrade your existing moissanite center stone for a diamond.

What about other gemstones?

Gemstones, aside from moissanites, will be listed in accordance to either their millimeter size or their carat weight. Every stone type carries its own unique traits for density and depth.