Stone Size Equivalents - Round

Round Stone Size	Approximate Carat Equivalent
5 x 5 mm	0.5
5.5 x 5.5 mm	0.63
6 x 6 mm	0.8
6.5 x 6.5 mm	1
7 x 7 mm	1.2
7.5 x 7.5 mm	1.5
8 x 8 mm	2
8.5 x 8.5mm	2.5
9 x 9 mm	3
9.5 x 9.5 mm	3.5
10 x 10 mm	4
10.5 x 10.5 mm	4.5
11 x 11 mm	4.9