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Diameter In mm |
Circumference In mm |
Australia & Newzealand |
USA & Canada |
15.1 |
47.43 |
I |
4 1/2 |
15.5 |
48.69 |
J |
4 3/4 |
16 |
50.26 |
K |
5 1/4 |
16.3 |
51.2 |
L |
5 3/4 |
16.7 |
52.46 |
M |
6 1/4 |
17.1 |
53.72 |
N |
6 3/4 |
17.4 |
54.66 |
O |
7 1/4 |
17.7 |
55.6 |
P |
7 3/4 |
18.1 |
56.86 |
Q |
8 1/4 |
18.5 |
58.11 |
R |
8 3/4 |
18.9 |
59.37 |
S |
9 1/4 |
19.4 |
60.94 |
T |
9 3/4 |
19.8 |
62.2 |
U |
10 1/4 |
20.3 |
63.77 |
V |
10 3/4 |