On Shoe Sizing Guide
On sizing starts with foot length, then adjusts for real-world fit signals. Use the chart as a starting point and the fit verdict before buying.
Source-backed sizing
Fit biastrue to size
Confidence70%
WidthsD
12% runs small · 72% true to size · 16% runs large.
If you wear US 9 in another brand
| US | Recommended US men | UK | US Men | US Women | EU | CM |
|---|---|---|---|---|---|---|
| 7 | 7 | 6 | 7 | 8.5 | 37 | 24.5 |
| 8 | 8 | 7 | 8 | 9.5 | 38 | 25.5 |
| 9 | 9 | 8 | 9 | 10.5 | 39 | 26 |
| 10 | 10 | 9 | 10 | 11.5 | 41 | 27 |
| 11 | 11 | 10 | 11 | 12.5 | 42 | 28 |
| 12 | 12 | 11 | 12 | 13.5 | 43 | 29 |
How On models differ
Sources and confidence
2 source-backed sizing · 640 confidence samples. Use brand sizing as a starting point, then check the exact model and retailer return policy.