Circumference (mm)

AU / NZ

US / CA

46.7

H

3 ¾

47.43

I

4 ½

48.69

J

4 ¾

50.26

K

5 ¼

51.20

L

5 ¾

52.46

M

6 ¼

53.72

N

6 ¾

54.66

O

7 ¼

55.6

P

7 ¾

56.86

Q

8 ¼

58.11

R

8 ¾

59.37

S

9 ¼

60.94

T

9 ¾

62.2

U

10 ¼

63.77

V

10 ¾