US Size	UK Size	European Size	inside Circumference (mm)	Inside Diameter (mm)

3

F

44

46.8

14.8

3.5

G

45

48

15.2

4

H

46

49.3

15.6

4.5

I

47

50.6

16.0

5

J

48

51.9

16.4

5.5

K

50

53.1

16.8

6

L

51

54.4

17.2

6.5

M

52

55.7

17.6

7

N

54

57

18.0

7.5

O

55

58.3

18.4

8

P

56

59.5

18.8

8.5

Q

58

60.8

19.2

9

R

59

62.1

19.6

9.5

S

60

63.4

20.0

10

T

62

64.6

20.4

10.5

U

63

65.9

20.8

11

V

64

67.2

21.2

11.5

W

66

68.5

21.6

12

X

67

69.7

22.0

12.5

Y

68

71

22.4

13

Z

70

72.3

22.8

13.5

Z+1

71

73.6

23.2

14

Z+2

72

74.8

23.6