Size (inches) | Size (mm) | Diameter (mm) | U.S.A. size | Australian size | Italian size | French size | |
1 14/16 |
48 |
15.27 |
4 1/2 |
I 1/2 |
8 |
— |
|
1 15/16 |
49 |
15.70 |
5 |
J 1/2 |
9.5 |
— |
|
2 |
51 |
16.10 |
5 1/2 |
L |
10.5 |
51 3/4 |
|
2 1/16 |
52 |
16.51 |
6 |
M |
11.5 |
52 3/4 |
|
2 2/16 |
53 |
16.92 |
6 1/2 |
N |
13 |
54 |
|
2 3/16 |
55 |
17.35 |
7 |
O |
14.5 |
55 1/4 |
|
2 4/16 |
56 |
17.75 |
7 1/2 |
P |
16 |
56 1/2 |
|
2 5/16 |
57 |
18.19 |
8 |
Q |
17 |
57 3/4 |
|
2 6/16 |
58 |
18.53 |
8 1/2 |
Q 1/2 |
18.5 |
58 |
|
2 7/16 |
59 |
18.89 |
9 |
R 1/2 |
19.5 |
59 1/4 |
|
2 8/16 |
61 |
19.41 |
9 1/2 |
S 1/2 |
21 |
60 1/2 |
|
2 9/16 |
62 |
19.84 |
10 |
T 1/2 |
22 |
61 3/4 |
|
2 10/16 |
63 |
20.20 |
10 1/2 |
U 1/2 |
23.5 |
62 3/4 |
|
2 11/16 |
65 |
20.68 |
11 |
V 1/2 |
25 |
64 1/4 |
|
2 12/16 |
66 |
21.08 |
11 1/2 |
W 1/2 |
26.5 |
66 |
|
2 13/16 |
68 |
21.49 |
12 |
Y |
27.5 |
67 1/2 |
|
2 14/16 |
69 |
21.89 |
12 1/2 |
Z |
28.5 |
68 3/4 |
|
2 15/16 |
70 |
22.33 |
13 |
— |
30 |
— |