Choosing the Right Diamond Size

Choosing the right diamond size is just as important as selecting its shape and quality. Our diamond size chart helps you easily understand how carat weight translates into millimeter (mm) measurements and visual appearance. Whether you’re looking for an engagement ring or a timeless jewellery piece, this guide will help you visualize and select the ideal diamond that matches your style and budget.

Why Diamond Size Matters?

When buying a diamond, size isn’t just about carats. It also involves how large the diamond looks when viewed from the top (the “face-up” size), which varies across different shapes like round, oval, cushion, or emerald cuts. Understanding this helps you make an informed decision and ensures your diamond looks stunning in every setting.

Carat Weight vs. Millimeter (MM) Size

Many buyers focus on carat weight, but millimeter measurements often give a more accurate idea of a diamond’s real-life appearance. For example, a 1-carat round diamond typically measures about 6.5 mm in diameter. Our chart below makes it easy to compare different carat weights and shapes side by side.