// On Running Lifestyle & Performance Footwear Standard Size Grid.

US Men US Women US Kids UK EU CM / JP Foot (cm)
- 5 - 3 36 22 22.0
- 5.5 - 3.5 36.5 22.5 22.5
- 6 - 4 37 23 23.0
- 6.5 - 4.5 37.5 23.5 23.5
- 7 - 5 38 24 24.0
- 7.5 - 5.5 38.5 24.5 24.5
- 8 - 6 39 25 25.0
- 8.5 - 6.5 40 25.5 25.5
- 9 - 7 40.5 26 26.0
- 9.5 - 7.5 41 26.5 26.5
- 10 - 8 42 27 27.0
- 10.5 - 8.5 42.5 27.5 27.5
- 11 - 9 43 28 28.0
7 - - 6.5 40 25 25.0
7.5 - - 7 40.5 25.5 25.5
8 - - 7.5 41 26 26.0
8.5 - - 8 42 26.5 26.5
9 - - 8.5 42.5 27 27.0
9.5 - - 9 43 27.5 27.5
10 - - 9.5 44 28 28.0
10.5 - - 10 44.5 28.5 28.5
11 - - 10.5 45 29 29.0
11.5 - - 11 46 29.5 29.5
12 - - 11.5 47 30 30.0
12.5 - - 12 47.5 30.5 30.5
13 - - 12.5 48 31 31.0
14 - - 13.5 49 31.5 31.5