Diamond Size Chart

Want to know the actual size of a 1 carat diamond on a hand? Use our diamond size chart to understand the millimeter (mm) size of each diamond shape.

Select your diamond shape:
MM Size 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
MM Size Carat Weight
0.8 mm 0.0025 ct
1 mm 0.005 ct
1.1 mm 0.0067 ct
1.2 mm 0.009 ct
1.25 mm 0.01 ct
1.3 mm 0.01 ct
1.5 mm 0.015 ct
1.75 mm 0.02 ct
1.8 mm 0.025 ct
2 mm 0.03 ct
2.2 mm 0.04 ct
2.5 mm 0.06 ct
2.75 mm 0.08 ct
3 mm 0.10 ct
3.25 mm 0.14 ct
3.5 mm 0.17 ct
3.75 mm 0.21 ct
4 mm 0.25 ct
4.25 mm 0.28 ct
4.5 mm 0.36 ct
4.75 mm 0.44 ct
5.0 mm 0.50 ct
5.25 mm 0.56 ct
5.5 mm 0.66 ct
5.75 mm 0.75 ct
6 mm 0.84 ct
6.25 mm 0.93 ct
6.5 mm 1.00 ct
6.8 mm 1.25 ct
MM Size Carat Weight
7 mm 1.30 ct
7.3 mm 1.50 ct
7.5 mm 1.67 ct
7.75 mm 1.75 ct
8 mm 2.00 ct
8.25 mm 2.11 ct
8.5 mm 2.43 ct
8.7 mm 2.50 ct
9 mm 2.75 ct
9.1 mm 3.00 ct
9.5 mm 3.35 ct
9.75 mm 3.50 ct
10 mm 3.87 ct
10.25 mm 4.00 ct
10.5 mm 4.41 ct
10.75 mm 4.50 ct
11 mm 5.00 ct
11.25 mm 5.49 ct
11.5 mm 5.85 ct
12 mm 6.84 ct
12.25 mm 7.26 ct
12.5 mm 7.36 ct
12.75 mm 7.52 ct
13 mm 8.51 ct
13.5 mm 9.53 ct
14 mm 10.49 ct
15 mm 12.89 ct
16 mm 16.06 ct
MM Size Carat
3.5 mm 0.25 ct
4.5 mm 0.50 ct
5.5 mm 1.00 ct
6.5 mm 2.00 ct
7.2 mm 3.00 ct
MM Size Carat
4.0 mm 0.50 ct
5.0 mm 1.00 ct
6.0 mm 1.50 ct
7.0 mm 2.50 ct
8.0 mm 4.00 ct
MM Size Carat
5x3 mm 0.50 ct
6x4 mm 1.00 ct
7x5 mm 2.00 ct
8x6 mm 3.50 ct
9x7 mm 5.00 ct
MM Size Carat
5x3 mm 0.50 ct
7x5 mm 1.00 ct
8x6 mm 2.00 ct
10x8 mm 4.00 ct
MM Size Carat
5x3 mm 0.50 ct
6x4 mm 1.00 ct
8x5 mm 2.50 ct
10x6 mm 4.50 ct