On Running Women's to Men's Shoe Size
This chart converts On Running women's to men's shoe sizes. A men's US size runs about 1.5 smaller than the women's size for the same foot, matched here by actual foot length so the mapping is exact rather than a flat offset.
Foot length units:
| US Women | US Men | UK | EU | CM (JP) | Foot length (cm) |
|---|---|---|---|---|---|
| 5 | — | 3 | 36 | 22 | 22 |
| 5.5 | — | 3.5 | 36.5 | 22.5 | 22.5 |
| 6 | — | 4 | 37 | 23 | 23 |
| 6.5 | — | 4.5 | 37.5 | 23.5 | 23.5 |
| 7 | — | 5 | 38 | 24 | 24 |
| 7.5 | — | 5.5 | 38.5 | 24.5 | 24.5 |
| 8 | 7 | 6 | 39 | 25 | 25 |
| 8.5 | 7.5 | 6.5 | 40 | 25.5 | 25.5 |
| 9 | 8 | 7 | 40.5 | 26 | 26 |
| 9.5 | 8.5 | 7.5 | 41 | 26.5 | 26.5 |
| 10 | 9 | 8 | 42 | 27 | 27 |
| 10.5 | 9.5 | 8.5 | 42.5 | 27.5 | 27.5 |
| 11 | 10 | 9 | 43 | 28 | 28 |
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Frequently asked questions
How many sizes apart are On Running men's and women's shoes?
About 1.5 US sizes — a On Running women's size is roughly 1.5 larger than the men's size for the same foot length. The chart above maps them exactly by foot length.