Diamond Size Chart
Princess Diamond Size Chart
Princess cut diamonds are square-shaped with sharp corners and a modern look. They carry more weight in their depth, so they appear smaller than round or oval cuts.
Average Princess Diamond Sizes
- 0.50 carat ≈ 4.5 mm
- 1.00 carat ≈ 5.5 mm
- 2.00 carat ≈ 7 mm
Tip: Go slightly higher in carat weight if you want the princess cut to have the same presence as a round.
Select a diamond shape.
| MM Size | Carat Weight |
|---|---|
| 1.5 mm | 0.015 ct |
| 1.75 mm | 0.03 ct |
| 2 mm | 0.06 ct |
| 2.25 mm | 0.08 ct |
| 2.5 mm | 0.10 ct |
| 2.75 mm | 0.13 ct |
| 3 mm | 0.18 ct |
| 3.25 mm | 0.25 ct |
| 3.5 mm | 0.29 ct |
| 3.75 mm | 0.31 ct |
| 4 mm | 0.39 ct |
| 4.25 mm | 0.44 ct |
| MM Size | Carat Weight |
|---|---|
| 4.5 mm | 0.50 ct |
| 4.75 mm | 0.64 ct |
| 5 mm | 0.75 ct |
| 5.25 mm | 0.90 ct |
| 5.5 mm | 1.00 ct |
| 5.75 mm | 1.11 ct |
| 6 mm | 1.25 ct |
| 6.25 mm | 1.39 ct |
| 6.5 mm | 1.50 ct |
| 6.75 mm | 1.75 ct |
| 7 mm | 2.00 ct |
| 7.25 mm | 2.01 ct |
| 7.5 mm | 2.50 ct |
| MM Size | Carat Weight |
|---|---|
| 7.75 mm | 2.74 ct |
| 8 mm | 3.00 ct |
| 8.25 mm | 3.24 ct |
| 8.5 mm | 3.50 ct |
| 8.75 mm | 4.00 ct |
| 9.25 mm | 4.50 ct |
| 9.5 mm | 5.00 ct |
| 9.75 mm | 5.36 ct |
| 10 mm | 5.62 ct |
| 10.25 mm | 5.76 ct |
| 10.5 mm | 5.99 ct |
| 11 mm | 7.44 ct |
| 11.5 mm | 9.44 ct |
| 12 mm | 9.52 ct |
Frequently Asked Questions
Why do princess cut diamonds look smaller than round diamonds of the same carat?
Princess cuts carry more weight in their depth rather than width, so their surface area appears slightly smaller compared to round cuts of equal carat.
Are princess cut diamonds durable?
They’re strong but have sharp corners that can chip if not protected. A V-prong or bezel setting helps safeguard the corners from damage.
What’s the ideal length-to-width ratio for a princess cut diamond?
A ratio between 1.00 and 1.05 creates a perfect square shape, while anything beyond that starts to look slightly rectangular.
Do princess cut diamonds hide inclusions well?
They’re decent at masking small inclusions, but because of their sharp facet lines, clarity grades of VS2 or higher are usually recommended.
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