US

UK/AU

(cm)

(in)

EU

4

2

21.5

8.46

32

4.5

2.5

22

8.66

33

5

3

22.5

8.86

34.5

6

3.5

23

9.06

36

6.5

4

23.5

9.25

37

7.5

5

24

9.45

38

8.5

6

24.5

9.65

39

9

6.5

25

9.84

40