Sizing Guide

INSIDE DIAMETER

INSIDE CIRCUMFERENCE

AU&UK

US

EU

in

mm

in

mm

0.555

14.1

1.74

44.2

F 1/2

3

44

0.571

14.5

1.79

45.5

G 1/2

3.5

45

0.586

14.88

1.84

46.8

H 1/2

4

46.5

0.602

15.92

1.89

48

I 1/2

4.5

47

0.618

15.7

1.94

49.3

J 1/2

5

48.5

0.634

16.1

1.99

50.6

K 1/2

5.5

50

0.65

16.51

2.04

51.9

L 1/2

6

51

0.666

16.92

2.09

53.1

M 1/2

6.5

52

0.682

17.32

2.14

54.4

N 1/2

7

55

0.698

17.73

2.19

55.7

O 1/2

7.5

56

0.714

18.14

2.24

57

P 1/2

8

57

0.73

18.54

2.29

58.3

Q 1/2

8.5

58.5

0.746

18.95

2.34

59.5

R 1/2

9

59

0.762

19.4

2.39

60.8

S 1/2

9.5

60.5

0.778

19.76

2.44

62.1

T 1/2

10

61.5

0.794

20.17

2.49

63.4

U 1/2

10.5

62

0.81

20.57

2.54

64.6

V 1/2

11

64

0.826

20.98

2.59

65.9

W 1/2

11.5

66