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Princess Cut Diamond Size Chart (MM)

Wondering what a 1 carat princess black diamond looks link on a hand? Our princess diamond size chart will help you convert millimeter (mm) size to carat size for princess cut diamonds.

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Princess Diamond Sizes

Princess MM
Size
Princess Weight
(ct)
Black Diamond ct
weight (Approx)
Princess MM
Size
Princess Weight
(ct)
Black Diamond ct
weight (Approx)
1.5 mm. 0.02 0.02 6.5 mm. 1.50 2.10
1.75 mm. 0.03 0.04 6.75 mm. 1.75 2.50
2 mm. 0.06 0.07 7 mm. 2.00 2.80
2.25 mm. 0.08 0.10 7.25 mm. 2.01 2.90
2.5 mm. 0.10 0.12 7.5 mm. 2.50 3.50
2.75 mm. 0.13 0.16 7.75 mm. 2.74 3.90
3 mm. 0.18 0.22 8 mm. 3.00 4.20
3.25 mm. 0.26 0.31 8.25 mm. 3.24 4.60
3.5 mm. 0.29 0.35 8.5 mm. 3.67 5.20
3.75 mm. 0.31 0.37 8.75 mm. 4.10 5.80
4 mm. 0.39 0.51 9 mm. 4.12 5.80
4.25 mm. 0.44 0.57 9.5 mm. 5.09 7.20
4.5 mm. 0.50 0.65 9.75 mm. 5.36 7.60
4.75 mm. 0.64 0.83 10 mm. 5.62 7.90
5 mm. 0.75 0.98 10.25 mm. 5.76 8.10
5.25 mm. 0.90 1.30 10.5 mm. 5.99 8.40
5.5 mm. 1.00 1.40 11 mm. 7.44 10.50
5.75 mm. 1.11 1.50 11.5 mm. 9.44 13.30
6 mm. 1.25 1.70 12 mm. 9.52 13.40
6.25 mm. 1.39 1.90