Circumference
(mm)
Diameter
(mm)
EU UK & AU US & CA CN SG & JP HK CH
44.2 14.1 44 F½ 3 6 4 6 4
44.8 14.3 45 G 5 5¼
45.5 14.5 G½ 3½ 7 7.5
46.1 14.7 46 H 6 6½
46.8 14.9 47 H½ 4 8 7 9
47.4 15.1 I 9
7¾
48.0 15.3 48 I½
8 10
48.7 15.5 J 9
49.3 15.7 49 J½ 5 10 9 11
50.0 15.9 50 K 10
50.6 16.1 K½
11 10 12
51.2 16.3 51 L 11¾
51.9 16.5 52 L½ 6 12 11 13 12¾
52.5 16.7 M 13 12
53.1 16.9 53 M½
13 14.5 14
53.8 17.1 N 14
54.4 17.3 54 N½ 7 14 16 15¼
55.1 17.5 55 O 15
55.7 17.7 O½
15 17 16½
56.3 17.9 56 P 16
57.0 18.1 57 P½ 8 17 16 17¾
57.2 18.2 18
57.6 18.3 Q
58.3 18.5 58 Q½ 8½ 18 17 19
58.9 18.8 59 R 19
59.5 19.0 R½ 9 19 18 20.5
60.2 19.2 60 S 20 20¼