AUSTRALIA/UK ITALY USA EUROPEAN (circumference mm)
H
7
3 3/4
47
H 1/2
7.5
4
47.5
I
8
4 1/4
48
I 1/2
8.5
4 1/2
48.5
J
9
4 3/4
49
J 1/2
9.5
5
50
K
10
5 1/4
50.5
K 1/2
11
5 1/2
51
L
11.5
5 3/4
52
L 1/2
12
6
52.5
M
13
6 1/4
53
M 1/2
13.5
6 1/2
53.5
N
14
6 3/4
54
N 1/2
14.5
7
55
O
15
7 1/4
55.5
O 1/2
16
7 1/2
56
P
16.5
7 3/4
57
P 1/2
17
8
57.5
Q
18
8 1/4
58
Q 1/2
18.5
8 1/2
58.5
R
19
8 3/4
59
R 1/2
19.5
9
60
S
20
9 1/4
60.5
S 1/2
21
9 1/2
61
T
21.5
9 3/4
62
T 1/2
22
10
62.5
U
23
10 1/4
63
U 1/2
23.5
10 1/2
64
V
24
10 3/4
64.5
V 1/2
24.5
11
65
W
25.5
11 1/4
65.5
W 1/2
26
11 1/2
66
X
26.5
11 3/4
67
X 1/2
27.5
12
67.5
Y
28
12 1/4
68
Y 1/2
28.5
12 1/2
68.5
Z
29
12 3/4
69
Z + 1
30.5
13 1/4
70.5
Z + 2
31.5
13 3/4
71.5
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