SIZE Inch US WOMEN UK EUROPE JAPAN FOOT LENGTH 

OUTSOLE   LENGTH 
5 5 2.5 35.5 22 8 ⅝ 9 ¾
5.5 5.5 3 36 22.5 8 ⅞ 9 ¾
6 6 3.5 36.5 23 9 9 ¾
6.5 6.5 4 37.5 23.5 9 ⅛ 10
7 7 4.5 38 24 9 ¼ 10 
7.5 7.5 5 38.5 24.5 9 ½ 10 ¼
8 8 5.5 39 25 9 ⅝ 10 ¼
8.5 8.5 6 40 25.5 9 ¾ 10 ⅝
9 9 6.5 40.5 26 10 10 ¾
9.5 9.5 7 41 26.5 10 ⅛ 10 ¾
10 10 7.5 42 27 10 ¼ 11 ⅛
10.5 10.5 8 42.5 27.5 10 ½ 11 ⅜
11 11 8.5 43 28 10 ⅝ 11 ⅜
11.5 11.5 9 44 28.5 10 ¾ 11 ⅝
12 12 9.5 44.5 29 11 12
SIZE  cm US WOMEN UK EUROPE JAPAN FOOT LENGTH OUTSOLE    LENGTH
5 5 2.5 35.5 22 22 24.8
5.5 5.5 3 36 22.5 22.6 24.8
6 6 3.5 36.5 23 23 24.8
6.5 6.5 4 37.5 23.5 23.2 25.4
7 7 4.5 38 24 23.5 25.4
7.5 7.5 5 38.5 24.5 24 26.2
8 8 5.5 39 25 24.5 26.2
8.5 8.5 6 40 25.5 24.8 27
9 9 6.5 40.5 26 25.4 27.3
9.5 9.5 7 41 26.5 25.7 27.3
10 10 7.5 42 27 26 28.3
10.5 10.5 8 42.5 27.5 26.7 29
11 11 8.5 43 28 27 29
11.5 11.5 9 44 28.5 27.3 29.5
12 12 9.5 44.5 29 28 30.5

Measurements are provided by suppliers.