Size Guide

Diameter

US

UK

European

14 mm

3

f1/2

44

14.6 mm

3.75

h

46

15.3 mm

4.5

h1/2 - i1/2

48

16 mm

5

j-k

50

16.5 mm

6

l - l1/2

52

17.2 mm

7

m1/2 - n1/2

54

17.8 mm

7.5

o - p

56

18.5 mm

8.5

p1/2 - q1/2

58

19 mm

9

r1/2 - s

60

19.8 mm

10

t1/2

62

20.4 mm

10.5

v

64