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SIZE CHART

DIAMETER MM US/CANADA UK/AUSTRALIA
15.7 mm 5 J 1/2
15.9 mm 5.25 K
16.1 mm 5.5 K 1/2
16.3 mm 5.75 L
16.5 mm 6 L 1/2
16.7 mm 6.25 M
16.9 mm 6.5 M 1/2
17.1 mm 6.75 N
17.3 mm 7 N 1/2
17.5 mm 7.25 O
17.7 mm 7.5 O 1/2
17.9 mm 7.75 P
18.1 mm 8 P 1/2
18.3 mm 8 1/4 Q
18.5 mm 8 1/2 Q 1/2
18.7 mm 8 3/4 R
18.9 mm 9 R 1/2
19.2 mm 9.25 S
19.4 mm 9.5 S 1/2
19.6 mm 9.75 T
19.8 mm 10 T 1/2
20 mm 10.25 U
20.2 mm 10.5 U 1/2
20.4 mm 10.75 V
20.6 mm 11 V 1/2
20.8 mm 11.25 W
21 mm 11.5 W 1/2
21.2 mm 11.75 X
21.4 mm 12 X 1/2
21.6 mm 12.25 Y
21.8 mm 12.5 Z
22 mm 12.75 Z 1/2
22.2 mm 13