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Convert Sizes By Country
Diameter (mm)
diameter (inches)
circumference (mm)
circumference (inches)
British/Australian
23.06
15.53
0.611
48.79
J 1/4
23.24
15.7
0.618
49.32
J 1/2
23.47
15.8
0.622
49.64
K
23.55
15.9
0.626
49.95
K 1/4
23.87
16
0.63
50.27
K 1/2
24.27
16.1
0.634
50.58
L
9.91
16.3
0.642
51.21
L 1/4
10.72
16.41
0.646
51.55
L 1/2
11.53
16.51
0.65
51.87
M
11.95
16.71
0.658
52.5
M 1/2
12.18
16.92
0.666
53.16
N
12.37
17.13
0.674
53.82
N 1/2
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