| Round MM Size | Round Carat Weight |
|---|---|
| 4 mm | 0.25 ct |
| 5.0 mm | 0.50 ct |
| 5.75 mm | 0.75 ct |
| 6.5 mm | 1.00 ct |
| 6.8 mm | 1.25 ct |
| 7.3 mm | 1.50 ct |
| 7.75 mm | 1.75 ct |
| 8 mm | 2.00 ct |
| 8.7 mm | 2.50 ct |
| 9.1 mm | 3.00 ct |
| 9.75 mm | 3.50 ct |
| 10.25 mm | 4.00 ct |
| 10.75 mm | 4.50 ct |
| 11 mm | 5.00 ct |
Explore our comprehensive Diamond Size Charts by Shape to find the perfect fit for your jewelry designs
Learn about diamonds and discover the 4C’s, diamond grading, and certifications to help you pick the perfect diamond.
Read moreSIZE CHART GUIDES
The Round Cut Diamond is the most ideal and well-knowing shape from the beginning. If we go back to history, the first diamond engagement ring to exist was a round cut diamond. Round cut diamond engagement rings are best known for their charming design that can rock any look. The round diamond shape stands out as it allows the diamond to sparkle in its own beauty.
Hence, the most famous solitaire diamond engagement ring comes mostly in round cut shape. the publication of Marcel Tolkowsky’s thesis “Diamond Design,” the round shape diamond first comes into prominence. It is more seen and loved by the color white Because Its 57 to 58 facets bring out the most brilliance, fire, and sparkle of all the shapes.
Generally, longer shaped fancy diamonds tend to appear bigger and broader to the naked eye when compared to a round or square-shaped diamonds of similar carat weight.
The length into width measurements directly correspond to the shape of the diamond. It is a typical phenomenon for a well-cut diamond of a carat weight.
The crown area is the actual size of the diamond as how it would appear when viewed from the top. Visually a marquise shape would appear larger than a round shape in its top view.
