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Round Diamond MM Size Round Diamond Carat Weight (Approx.)
4.0 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.
8.0 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.
11.0 mm. 5.00 ct.