Diamond Size Chart
Radiant Diamond Size Chart
Radiant cut diamonds have trimmed corners and a brilliant cut style that blends round sparkle with an emerald-like outline.
Average Radiant Diamond Sizes
- 0.50 carat ≈ 5 x 4 mm
- 1.00 carat ≈ 6.5 x 5.5 mm
- 2.00 carat ≈ 8 x 7 mm
Tip: Rectangular radiants often look bigger than square ones of the same carat.
Select a diamond shape.
| MM Size | Carat Weight |
|---|---|
| 4.3x3 mm. | 0.25 ct. |
| 4.5x3.5 mm. | 0.34 ct. |
| 6x3 mm. | 0.41 ct. |
| 6x4 mm. | 0.50 ct. |
| 6.5x4.5 mm. | 0.75 ct. |
| 7x5 mm. | 1.00 ct. |
| 7.3x5.5 mm. | 1.25 ct. |
| 7.5x5.8 mm. | 1.50 ct. |
| 8x6 mm. | 1.75 ct. |
| MM Size | Carat Weight |
|---|---|
| 8.2x6.2 mm. | 2.00 ct. |
| 8.5x6.5 mm. | 2.25 ct. |
| 9x7 mm. | 2.50 ct. |
| 9.5x7.5 mm. | 3.00 ct. |
| 10x7 mm. | 3.31 ct. |
| 10x8 mm. | 3.50 ct. |
| 10.2x8.2 mm. | 4.00 ct. |
| 10.5x8.5 mm. | 4.50 ct. |
| 11x9 mm. | 5.00 ct. |
| MM Size | Carat Weight |
|---|---|
| 11.5x10 mm. | 6.45 ct. |
| 12x9 mm. | 6.06 ct. |
| 13x9 mm. | 6.54 ct. |
| 13.2x9.2 mm. | 6.79 ct. |
| 14x10 mm. | 8.47 ct. |
| 13x11 mm. | 9.33 ct. |
| 13.5x11.5 mm. | 10.19 ct. |
| 15x11 mm. | 11.48 ct. |
| 14x12 mm. | 12.14 ct. |
| 16x12 mm. | 14.22 ct. |
Frequently Asked Questions
How do I use a radiant cut diamond size chart?
The chart helps you understand how different carat weights translate into millimeter dimensions, making it easier to visualize the stone’s actual size.
How does cut quality affect a radiant diamond’s size?
A well-cut radiant diamond reflects light efficiently, creating a bigger, brighter look even at smaller carat weights.
Are radiant cut diamonds rectangular or square?
They can be either. The cut allows flexibility in proportions, so you can choose between a perfectly square or slightly elongated rectangle.
How does carat weight affect radiant diamond dimensions?
As carat weight increases, both the length and width grow proportionally, but depth variations can slightly affect how large it looks.
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