US |
UK/AU |
FR |
IT |
JP |
Inside Diameter |
Inside Circumference |
5 |
J 1/2 |
50 |
9.5 |
9 |
15.7 mm |
49.0 mm |
6 |
M |
52 3/4 |
11.5 |
12 |
16.5 mm |
51.5 mm |
7 |
O |
55 1/4 |
14.5 |
14 |
17.3 mm |
54.0 mm |
8 |
Q |
57 3/4 |
17 |
16 |
18.2 mm |
56.6 mm |