Ring
Size
|
Measured
Size
|
USA |
inches |
mm |
cm |
4 |
1.8307" |
46.5 |
4.65 |
4
1/2 |
1.8818" |
47.8 |
4.78 |
5 |
1.9291" |
49.0 |
4.90 |
5
1/2 |
1.9803" |
50.3 |
5.03 |
6 |
2.0275" |
51.5 |
5.15 |
6
1/2 |
2.0787" |
52.8 |
5.28 |
7 |
2.1259" |
54.0 |
5.40 |
7
1/2 |
2.1771" |
55.3 |
5.53 |
8 |
2.2283" |
56.6 |
5.66 |
8
1/2 |
2.2755" |
57.8 |
5.78 |
9 |
2.3267" |
59.1 |
5.91 |
9
1/2 |
2.3740" |
60.3 |
6.03 |
10 |
2.4251" |
61.6 |
6.16 |
10
1/2 |
2.4724" |
62.8 |
6.28 |
11 |
2.5236" |
64.1 |
6.41 |
11
1/2 |
2.5708" |
65.3 |
6.53 |
12 |
2.6220" |
66.6 |
6.66 |
12
1/2 |
2.6732" |
67.9 |
6.79 |
13 |
2.7204" |
69.1 |
6.91 |
|