On Running
Runs SmallOn Running fits slightly narrow and runs about half a size small for most foot shapes. The Cloud, Cloudmonster, and Cloudswift all benefit from sizing up half a size, particularly if you have a wider forefoot. The Swiss-engineered last is built around a narrower European foot profile. If you sit between sizes, go up rather than down.
On Running runs small. Size up at least half a size, and consider a full size up if you are between sizes.
Very narrow
Men's Size Chart
| US | EU | UK | CM |
|---|---|---|---|
| 6 | 38 | 5 | 24.1 |
| 6.5 | 38.5 | 5.5 | 24.4 |
| 7 | 39 | 6 | 24.8 |
| 7.5 | 39.5 | 6.5 | 25.1 |
| 8 | 40 | 7 | 25.4 |
| 8.5 | 41 | 7.5 | 25.7 |
| 9 | 41.5 | 8 | 26 |
| 9.5 | 42 | 8.5 | 26.4 |
| 10 | 42.5 | 9 | 26.7 |
| 10.5 | 43 | 9.5 | 27 |
| 11 | 43.5 | 10 | 27.3 |
| 12 | 44.5 | 11 | 28 |
| 13 | 46 | 12 | 28.6 |
| 15 | 48 | 14 | 30.2 |
Women's Size Chart
| US | EU | UK | CM |
|---|---|---|---|
| 5 | 35 | 2.5 | 22 |
| 5.5 | 35.5 | 3 | 22.4 |
| 6 | 36 | 3.5 | 22.9 |
| 6.5 | 36.5 | 4 | 23.3 |
| 7 | 37 | 4.5 | 23.8 |
| 7.5 | 37.5 | 5 | 24.1 |
| 8 | 38 | 5.5 | 24.6 |
| 8.5 | 38.5 | 6 | 25 |
| 9 | 39 | 6.5 | 25.4 |
| 9.5 | 39.5 | 7 | 25.7 |
| 10 | 40 | 7.5 | 26.2 |
| 11 | 41 | 8.5 | 27.1 |
| 12 | 42 | 9.5 | 28 |
Common questions about On Running sizing
Does On Running run small, true to size, or large?
On Running runs small. Very narrow.
What width do On Running shoes come in?
Very narrow. Check individual product pages for wide-width availability.
How does On Running sizing compare to Nike?
On Running and Nike fit similarly. Both runs small, so your usual Nike size is a reliable starting point at On Running.
Can I return On Running shoes if the size is wrong?
Most On Running retailers offer free returns on unworn shoes within 30 days. Check the retailer's return policy before ordering, as third-party sellers may differ.