On Shoe Size Chart & Fit Guide
On runs true to size. Find the On size to order from your usual size, in US, UK and EU, with foot length.
From your usual size, here's what to order in On:
| Your US size | On size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6.5 | 5.5 | 37 | 23.5 |
| 6.5 | 6.5 | 5.5 | 37.5 | 23.9 |
| 7 | 7 | 6 | 38 | 24.3 |
| 7.5 | 7.5 | 6.5 | 38.5 | 24.7 |
| 8 | 8 | 7 | 39.5 | 25.1 |
| 8 | 8 | 7 | 40 | 25.5 |
| 8.5 | 8.5 | 7.5 | 41 | 25.9 |
| 9 | 9 | 8 | 41.5 | 26.3 |
| 9.5 | 9.5 | 8.5 | 42.5 | 26.7 |
| 10 | 10 | 9 | 43 | 27.1 |
| 10.5 | 10.5 | 9.5 | 43.5 | 27.5 |
| 11 | 11 | 10 | 44 | 27.9 |
| 11.5 | 11.5 | 10.5 | 44.5 | 28.3 |
| 12 | 12 | 11 | 45.5 | 28.7 |
| 12.5 | 12.5 | 11.5 | 46 | 29.1 |
| 13 | 13 | 12 | 47 | 29.5 |
| 13.5 | 13.5 | 12.5 | 47.5 | 29.9 |
| 14 | 14 | 13 | 48 | 30.3 |
| 14 | 14 | 13 | 48.5 | 30.7 |
| 14.5 | 14.5 | 13.5 | 49 | 31.1 |
| 15 | 15 | 14 | 49.5 | 31.5 |
Specific sizes: On 6.5 (M), On 7 (M), On 7.5 (M), On 8 (M), On 8.5 (M), On 9 (M), On 9.5 (M), On 10 (M), On 10.5 (M), On 11 (M), On 11.5 (M), On 12 (M), On 12.5 (M), On 13 (M), On 13.5 (M), On 14 (M), On 14.5 (M), On 15 (M), On 6.5 (W), On 7 (W), On 7.5 (W), On 8 (W), On 8.5 (W), On 9 (W), On 9.5 (W), On 10 (W), On 10.5 (W), On 11 (W), On 11.5 (W), On 12 (W), On 12.5 (W)
Other brands: browse all brand size charts →
Convert On to another brand:
On → Nike · On → Jordan · On → adidas · On → Puma · On → New Balance · On → ASICS · On → Brooks · On → HOKA · On → Reebok · On → Under Armour · On → Converse · On → Vans · On → Skechers · On → Crocs · On → Dr. Martens · On → Timberland · On → Clarks · On → UGG · On → Salomon · On → Merrell · On → Fila · On → Veja · On → Allbirds
Does On run true to size?
On is commonly reported to run true to size.
How do I find my On size?
Measure your foot length, find your standard US size, then add to get your On size. The chart above does this for you.
Shop On in your recommended size — check model fit notes too.
View on Amazon →Size from your foot length, not the label — the reliable starting point.
View on Amazon →Take up a touch of slack if a size runs slightly large.
View on Amazon →