Ring Size
Diameter (Millimeters)
Diameter (Centimeters)
3
14.0 MM
1.40 CM
4
14.8 MM
1.48 CM
5
15.6 MM
1.56 CM
6
16.45 MM
1.645 CM
7
17.3 MM
1.73 CM
8
18.2 MM
1.82 CM
9
19.0 MM
1.90 CM
10
19.8 MM
1.98 CM
11
20.6 MM
2.06 CM
12
21.4 MM
2.14 CM