Diamond Size Chart

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Diamond Size Chart

Round Diamond Size Chart

A round diamond is a traditional stone that is cut into a circular shape with a faceted bottom to create dimension and life in the stone. Round Diamonds are faceted to give as much life to the stone as possible and this versatile shape works well in nearly all settings. The round diamond cut dates back to the beginning of gem cutting and is one of the oldest shapes that is still cut today. The larger the carat weight of the stone, the larger the flat table surface of the stone and the greater the potential for faceting.

MM Size	Carat Weight
0.8 mm	0.0025 ct
1 mm	0.005 ct
1.12 mm	0.0075 ct
1.15 mm	0.00067 ct
1.25 mm	0.01 ct
1.3 mm	0.01 ct
1.5 mm	0.015 ct
1.75 mm	0.02 ct
1.8 mm	0.025 ct
2 mm	0.03 ct
2.25 mm	0.04 ct
2.5 mm	0.06 ct
2.75 mm	0.08 ct
3 mm	0.11 ct
3.25 mm	0.14 ct
3.5 mm	0.17 ct
3.75 mm	0.21 ct
4 mm	0.25 ct
4.25 mm	0.28 ct
4.5 mm	0.36 ct
4.75 mm	0.44 ct
5 mm	0.46 ct
5.25 mm	0.56 ct
5.5 mm	0.66 ct
5.75 mm	0.76 ct
6 mm	0.84 ct
6.25 mm	0.93 ct
6.5 mm	1.03 ct
6.75 mm	1.24 ct

MM Size	Carat Weight
7 mm	1.28 ct
7.25 mm	1.49 ct
7.5 mm	1.67 ct
7.75 mm	1.75 ct
8 mm	2.04 ct
8.25 mm	2.11 ct
8.5 mm	2.43 ct
8.75 mm	2.55 ct
9 mm	2.75 ct
9.25 mm	3.05 ct
9.5 mm	3.35 ct
9.75 mm	3.61 ct
10 mm	3.87 ct
10.25 mm	4.16 ct
10.5 mm	4.41 ct
10.75 mm	4.57 ct
11 mm	4.91 ct
11.25 mm	5.49 ct
11.5 mm	5.85 ct
12 mm	6.84 ct
12.25 mm	7.26 ct
12.5 mm	7.36 ct
12.75 mm	7.52 ct
13 mm	8.51 ct
13.5 mm	9.63 ct
14 mm	10.49 ct
15 mm	12.89 ct
16 mm	16.03 ct
17 mm	18.80 ct

Oval Diamond Size Chart

Oval cut stones are a stunning alternative for those that want a stone that is going to draw attention but that is not a typically mainstream choice. The oval cut stone offers an elongated shape that is lovely either running vertically or horizontally on its side. An oval stone is also going to look larger, even if the stones weight is not incredibly large. The oval cut stone has the potential to have the same brilliance and shine as a round cut stone if the jeweler facets it to achieve the most shine possible. An oval stone is a unique choice that is going to be beautiful and stand out among other engagement rings.

MM Size	Carat Weight
4.5 x 3.5 mm	0.21 ct
5 x 3 mm	0.21 ct
5 x 4 mm	0.32 ct
5.5 x 3.5 mm	0.33 ct
6 x 4 mm	0.43 ct
6.5 x 4.5 mm	0.65 ct
6.5 x 5 mm	0.61 ct
7 x 5 mm	0.76 ct
7.5 x 5.5 mm	0.98 ct
8 x 6 mm	1.21 ct
8.5 x 6.5 mm	1.46 ct
9 x 6 mm	1.41 ct
9 x 7 mm	1.86 ct

MM Size	Carat Weight
10 x 8 mm	2.54 ct
10.5 x 8.5 mm	2.88 ct
11 x 9 mm	3.85 ct
12 x 8 mm	4.99 ct
12 x 10 mm	5.05 ct
14 x 10 mm	5.81 ct
13 x 11 mm	6.05 ct
14 x 12 mm	8.21 ct
15 x 12 mm	8.75 ct
16 x 12 mm	9.32 ct
16 x 14 mm	11.88 ct
18 x 13 mm	12.86 ct
20 x 15 mm	14.96 ct

Marquise Diamond Size Chart

Marquise Diamonds are also known as football Diamonds due to their football like shape. They are oval with an elliptical shape and pointed ends. This a very vintage cut that is not often seen in engagement rings making a very unique cut for those that want something that is not going to be typical. This cut generally features 58 facets and offers a shape that is unlike any other. Marquise rings are going to look larger than they are and offer a shape that is going to draw attention and start conversation no matter where you go. This stone is great for those that want a unique look.

MM Size	Carat Weight
3 x 1.5 mm	0.025 ct
3.5 x 1.75 mm	0.065 ct
3.5 x 2 mm	0.07 ct
4 x 2 mm	0.1 ct
3.75 x 1.75 mm	0.11 ct
4.5 x 2.25 mm	0.12 ct
5 x 2.25 mm	0.14 ct
5 x 3 mm	0.2 ct
5.5 x 2.75 mm	0.16 ct
5.5 x 3 mm	0.18 ct
6 x 3 mm	0.25 ct
6.5 x 3 mm	0.29 ct
7 x 3 mm	0.3 ct
7 x 3.5 mm	0.33 ct
7.5 x 3.5 mm	0.35 ct
7 x 4 mm	0.4 ct
8 x 4 mm	0.47 ct
9 x 4.5 mm	0.71 ct

MM Size	Carat Weight
9 x 5 mm	0.76 ct
9.5 x 5 mm	0.85 ct
10 x 5 mm	0.95 ct
11 x 6.5 mm	1.25 ct
11.5 x 6 mm	1.33 ct
12 x 6 mm	1.62 ct
12 x 6.5 mm	1.71 ct
13 x 6.5 mm	2.11 ct
14 x 7 mm	2.48 ct
14 x 8 mm	3 ct
15 x 7 mm	3.09 ct
15 x 7.5 mm	3.12 ct
15 x 8 mm	3.44 ct
16 x 8 mm	3.86 ct
17 x 8.5 mm	4.88 ct
17.5 x 10 mm	5.5 ct
20 x 8 mm	7.08 ct
20 x 10 mm	7.94 ct
20 x 11 mm	9.5 ct

Heart Diamond Size Chart

For those that want something that is very visibly a declaration of love, a heart shaped diamond will surely do the trick. Heart shaped Diamonds are just that, Diamonds that have been fashioned to look like a heart. These stones are very modern and are often seen as a fun way to make an engagement ring less formal and more whimsical. A heart shaped stone is wonderful for those that want a less formal setting but that still want some carat weight to their stone. Heart shaped stones are gaining in popularity and are a fantastic way to make your ring truly different and unique.

MM Size	Carat Weight
3.5 mm	0.18 ct
4 mm	0.25 ct
4.25 mm	0.29 ct
4.5 mm	0.34 ct
4.75 mm	0.38 ct
5 mm	0.44 ct
5.5 mm	0.61 ct
6 mm	0.74 ct
6.25 mm	0.83 ct
6.5 mm	0.93 ct
7 mm	1.13 ct
7.5 mm	1.59 ct

MM Size	Carat Weight
8 mm	1.71 ct
9 mm	2.41 ct
9.5 mm	2.9 ct
10 mm	3.16 ct
11 mm	4.41 ct
12 mm	5.66 ct
13 mm	7.88 ct
14 mm	9.38 ct
15 mm	10.79 ct
16 mm	13.27 ct
18 mm	15.33 ct

Pear Diamond Size Chart

Pear shaped Diamonds are a vintage cut that is larger at the bottom and comes to a point at the top. These stones are stunning as stand alone pieces and have become more popular in engagement rings in years passed. The pear shaped diamond may also be referred to as the tear drop diamond for its drop shape. These Diamonds are more commonly used in other pieces of Jewelry but do make stunning engagement rings. These stones are known for their shape and their brilliance and present a unique opportunity to anyone that chooses to feature one in their engagement ring.

MM Size	Carat Weight
3 x 2 mm	0.13 ct
4 x 2.5 mm	0.18 ct
4 x 3 mm	0.21 ct
5 x 3 mm	0.25 ct
5 x 4 mm	0.35 ct
6 x 4 mm	0.39 ct
6.5 x 4.5 mm	0.57 ct
7 x 5 mm	0.71 ct
8 x 5 mm	0.81 ct
8.5 x 5.5 mm	1.08 ct
8 x 6 mm	1.25 ct
9 x 6 mm	1.33 ct
9 x 7 mm	1.75 ct
10 x 6 mm	1.71 ct
10 x 7 mm	1.8 ct
10 x 8 mm	2.46 ct
11 x 7.5 mm	2.61 ct
11 x 8 mm	3 ct
12 x 7 mm	3.12 ct

MM Size	Carat Weight
12 x 8 mm	3.21 ct
12 x 9 mm	3.44 ct
14 x 8 mm	3.47 ct
13 x 9 mm	4.11 ct
14 x 9 mm	4.25 ct
15 x 9 mm	5.06 ct
14 x 10 mm	5.41 ct
13 x 11 mm	5.65 ct
15 x 10 mm	5.75 ct
15 x 11 mm	7.36 ct
16 x 9 mm	5.86 ct
16 x 10 mm	6.27 ct
16 x 12 mm	8.99 ct
17 x 10 mm	6.46 ct
18 x 11 mm	8.14 ct
18 x 12 mm	9.35 ct
18 x 13 mm	10.21 ct

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