US
12.5
13
13.5
1
1.5
2
2.5
3
EU
30
31
31
32
33
33
34
34
UK
11.5
12
12.5
13
13.5
1
1.5
2
Canadian
12.5
13
13.5
1
1.5
2
2.5
3
Japanese
19
19.5
20
20.5
21
21.5
21.5
22
Inches
7 1/4
7 1/2
7 5/8
7 3/4
8
8 1/8
8 1/4
8 1/2
CM
18.4
19.1
19.4
19.7
20.3
20.6
21
21.6