This is an approximate conversion table to help you find your size.
Adult Size

US
Euro size
Inner Length (in)
Inner Length (cm)
W6
35
8.86
225
W6.5
36
9.05
230
M6/W7
37
9.33
237
M7/W8
38
9.57
243
M7.5/W9
39
9.84
250
M8.5/W10
40
10.12
257
M9/W10.5
41
10.35
263
M10/W11.5
42
10.63
270
M11/W12
43
10.90
277
M11.5/W13
44
11.14
283
M12/W13.5
45
11.41
290
M13
46
11.69
297
M14
47
11.93
303