👟 Brand to Brand
Reebok to On Shoe Size Conversion
Switching from Reebok to On? Reebok runs small and On runs true to size, so the size you order changes. Here's the full chart.
Reebok runs 0.5 size larger than On, so you may need to size down when switching.
Size up 0.5 moving to On
On runs smaller — order half a size larger than your Reebok size.
Find your Reebok size on the left, read across for On:
| Reebok size | On size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6 | 5.5 | 37 | 23.5 |
| 6.5 | 6 | 5.5 | 37.5 | 23.9 |
| 7 | 6.5 | 6 | 38 | 24.3 |
| 7.5 | 7 | 6.5 | 38.5 | 24.7 |
| 8 | 7.5 | 7 | 39.5 | 25.1 |
| 8 | 7.5 | 7 | 40 | 25.5 |
| 8.5 | 8 | 7.5 | 41 | 25.9 |
| 9 | 8.5 | 8 | 41.5 | 26.3 |
| 9.5 | 9 | 8.5 | 42.5 | 26.7 |
| 10 | 9.5 | 9 | 43 | 27.1 |
| 10.5 | 10 | 9.5 | 43.5 | 27.5 |
| 11 | 10.5 | 10 | 44 | 27.9 |
| 11.5 | 11 | 10.5 | 44.5 | 28.3 |
| 12 | 11.5 | 11 | 45.5 | 28.7 |
| 12.5 | 12 | 11.5 | 46 | 29.1 |
| 13 | 12.5 | 12 | 47 | 29.5 |
| 13.5 | 13 | 12.5 | 47.5 | 29.9 |
| 14 | 13.5 | 13 | 48 | 30.3 |
| 14 | 13.5 | 13 | 48.5 | 30.7 |
| 14.5 | 14 | 13.5 | 49 | 31.1 |
| 15 | 14.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Reebok runs about half a size small across many models. On (On Running) runs true to size for most, with a snug, performance fit.
On to Reebok → · Reebok chart · On chart · Brand finder
What is a Reebok 10.5 in On?
A Reebok 10.5 is about a On 10 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Reebok and On fit the same?
Not quite — On runs about 0.5 size smaller than Reebok.
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