EU 36 36.5 37 38 39 39.5 40
CM 22.1 22.5 22.9 23.7 24.1 24.6 25
UK 3 3.5 4 5 5.5 6 6.5

EU
41
41.5
42
42.5
43
44
44.5
CM
25.4
25.8
26.3
26.7
27.2
27.6
28
UK
7
7.5
8
8.5
9
9.5
10

EU
45
46
47
48
49.5
CM
28.5
28.9
29.8
30.6
31.4
UK
10.5
11
12
13
14

The size guide is taken directly from Clark's own website and is approximate as different models may vary.