Diamond Size Guide: Visualize Your Perfect Stone

Welcome to our Diamond Size Guide, your go-to resource for understanding how different diamond shapes and sizes translate from carats to millimeters. Whether you're considering a round, cushion, or other diamond shape, our charts make it easy to see how each stone will look in real life. Use the buttons below to navigate directly to the specific shape you're interested in, and find the ideal diamond that matches your vision of beauty and elegance.

Round

Square cushion

Princess

Oval

Emerald

Heart

Pear

Marquise

Asscher

Radiant

Round Diamond Size: MM to Carat Guide

Wondering how diamond sizes stack up in real life? Our Round Diamond Size Chart translates carat weights into millimeter (mm) measurements, which represent the diamond’s diameter when viewed from above. This gives you a clear picture of how different sizes will look on your jewelry. Use this guide to find the perfect balance of size and sparkle that suits your style.

MM Size	Carat weight
4.00mm	0.25ct
5.00mm	0.50ct
5.75mm	0.75ct
6.50mm	1.00ct
6.80mm	1.25ct
7.30mm	1.50ct
7.75mm	1.75ct
8.00mm	2.00ct
8.70mm	2.50ct
9.10mm	3.00ct
9.75mm	3.50ct
10.25mm	4.00ct
10.75mm	4.50ct
11.00mm	5.00ct

Square Cushion Diamond Size: MM to Carat Guide

Choosing the perfect square cushion diamond? Our Square Cushion Diamond Size Chart converts carat weights into millimeter (mm) measurements, showing you the diamond's size when viewed from above. With just one mm measurement, this guide makes it easy to visualize how each carat size will look on your jewelry, helping you find that perfect fit with a balance of elegance and sparkle.

MM Size	Carat weight
3.25mm	0.25ct
4.90mm	0.50ct
5.25mm	0.75ct
5.50mm	1.00ct
6.00mm	1.25ct
6.50mm	1.50ct
6.75mm	1.75ct
7.00mm	2.00ct
7.50mm	2.50ct
8.00mm	3.00ct

Princess Cut Diamond Size: Carat to MM Conversion

Step into the world of sharp elegance with our Princess Cut Diamond Size Chart. This guide translates carat weight into millimeter (mm) measurements, giving you the exact dimensions of your princess cut diamond when viewed from above. Perfect for those who love clean lines and modern sparkle, this chart helps you visualize how each size will capture light and attention in your jewelry.

MM Size	Carat weight
3.25mm	0.25ct
4.50mm	0.50ct
5.00mm	0.75ct
5.50mm	1.00ct
6.00mm	1.25ct
6.50mm	1.50ct
6.75mm	1.75ct
7.00mm	2.00ct
7.50mm	2.50ct
8.00mm	3.00ct

Oval Diamond Size: Carat to MM Conversion

Discover the allure of graceful sophistication with our Oval Diamond Size Chart. This guide converts carat weight into precise millimeter (mm) measurements, allowing you to see the exact dimensions of your oval diamond from a top-down view. Ideal for those who appreciate the soft, elegant curves of an oval cut, this chart helps you envision how each size will reflect light and make a statement in your jewelry.

MM Size	Carat weight
5.00x3.00mm	0.25ct
6.00x4.00mm	0.50ct
7.00x5.00mm	0.75ct
7.70x5.70mm	1.00ct
8.00x6.00mm	1.25ct
8.50x6.50mm	1.50ct
9.00x6.50mm	1.75ct
9.00x7.00mm	2.00ct
10.00x8.00mm	2.50ct
12.00x8.00mm	3.00ct

Emerald Cut Diamond Size: Carat to MM Conversion

Experience timeless elegance with our Emerald Cut Diamond Size Chart. This guide converts carat weight into exact millimeter (mm) measurements, offering a clear view of the dimensions of your emerald cut diamond from above. Perfect for those who admire the sleek, elongated facets of this classic shape, this chart helps you visualize how each size will reflect light and create a bold, sophisticated statement in your jewelry.

MM Size	Carat weight
4.30x3.00mm	0.25ct
6.00x4.00mm	0.50ct
6.50x4.50mm	0.75ct
7.00x5.00mm	1.00ct
7.30x5.30mm	1.25ct
7.50x5.50mm	1.50ct
8.00x6.00mm	1.75ct
8.50x6.50mm	2.00ct
9.00x7.00mm	2.50ct
9.30x7.50mm	3.00ct

Heart Shaped Diamond Size: Carat to MM Conversion

Embrace romantic charm with our Heart Shaped Diamond Size Chart. This guide converts carat weight into accurate millimeter (mm) measurements, giving you a detailed view of the dimensions of your heart-shaped diamond from above. Ideal for those who adore the unique blend of sentimentality and sparkle, this chart helps you visualize how each size will capture light and make a truly heartfelt statement in your jewelry.

MM Size	Carat weight
4.00mm	0.25ct
5.00mm	0.50ct
6.00mm	0.75ct
6.50mm	1.00ct
7.00mm	1.25ct
7.50mm	1.50ct
7.70mm	1.75ct
8.00mm	2.00ct
8.50mm	2.50ct
9.00mm	3.00ct

Pear Shaped Diamond Size: Carat to MM Conversion

Unveil timeless elegance with our Pear Shaped Diamond Size Chart. This guide translates carat weight into precise millimeter (mm) measurements, offering a clear view of the dimensions of your pear-shaped diamond from above. Perfect for those who appreciate the blend of soft curves and a striking point, this chart helps you visualize how each size will catch the light and create a graceful, eye-catching statement in your jewelry.

MM Size	Carat weight
5.00x3.00mm	0.25ct
6.00x4.00mm	0.50ct
7.00x5.00mm	0.75ct
7.70x5.70mm	1.00ct
8.00x6.00mm	1.25ct
8.50x6.50mm	1.50ct
10.00x6.00mm	1.75ct
9.00x7.00mm	2.00ct
10.00x8.00mm	2.50ct
12.00x8.00mm	3.00ct

Marquise Diamond Size: Carat to MM Conversion

Step into regal beauty with our Marquise Diamond Size Chart. This guide converts carat weight into exact millimeter (mm) measurements, allowing you to see the full dimensions of your marquise diamond from above. Ideal for those who admire the elongated shape and pointed ends of this classic cut, this chart helps you visualize how each size will capture light and create a striking, elegant statement in your jewelry.

MM Size	Carat weight
6.00x3.00mm	0.25ct
8.00x4.00mm	0.50ct
9.00x4.50mm	0.75ct
10.00x5.00mm	1.00ct
11.00x5.50mm	1.25ct
12.00x6.00mm	1.50ct
12.50x6.25mm	1.75ct
13.00x6.50mm	2.00ct
14.00x7.00mm	2.50ct
15.00x7.00mm	3.00ct

Asscher Diamond Size: Carat to MM Conversion

Embrace the refined elegance of the Asscher cut with our Asscher Diamond Size Chart. This guide translates carat weight into precise millimeter (mm) measurements, giving you a clear view of the dimensions of your Asscher cut diamond from above. Perfect for those who appreciate the geometric beauty and stepped facets of this unique shape, this chart helps you visualize how each size will capture and reflect light, creating a sophisticated, vintage-inspired statement in your jewelry.

MM Size	Carat weight
3.25mm	0.25ct
4.50mm	0.50ct
5.00mm	0.75ct
5.50mm	1.00ct
6.00mm	1.25ct
6.50mm	1.50ct
6.70mm	1.75ct
7.00mm	2.00ct
7.50mm	2.50ct
8.00mm	3.00ct

Radiant Diamond Size: Carat to MM Conversion

Discover the vibrant brilliance of the Radiant cut with our Radiant Diamond Size Chart. This guide converts carat weight into precise millimeter (mm) measurements, giving you a detailed view of the dimensions of your Radiant cut diamond from above. Ideal for those who love the blend of the square shape and the sparkle of brilliant-cut facets, this chart helps you visualize how each size will capture and amplify light, creating a bold and dazzling statement in your jewelry.

MM Size	Carat weight
4.30x3.00mm	0.25ct
6.00x4.00mm	0.50ct
6.50x4.50mm	0.75ct
7.00x5.00mm	1.00ct
7.30x5.50mm	1.25ct
7.50x5.80mm	1.50ct
8.00x6.00mm	1.75ct
8.20x6.20mm	2.00ct
9.00x7.00mm	2.50ct
9.50x7.50mm	3.00ct