👟 Brand to Brand
On to Clarks Shoe Size Conversion
Switching from On to Clarks? On runs true to size and Clarks runs large, so the size you order changes. Here's the full chart.
A On 9 works out to a Clarks 8.5 — about half a size down. The chart below has every size.
On → Clarks: size down half a size
A On 9 is a Clarks 8.5.
Find your On size on the left, read across for Clarks:
| On size | Clarks size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6 | 5.5 | 37 | 23.5 |
| 7 | 6.5 | 6 | 38 | 24.3 |
| 7.5 | 7 | 6.5 | 38.5 | 24.7 |
| 8 | 7.5 | 7 | 39.5 | 25.1 |
| 8.5 | 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 |
| 14.5 | 14 | 13.5 | 49 | 31.1 |
| 15 | 14.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. On (On Running) runs true to size for most, with a snug, performance fit. Clarks runs about half a size large for many styles; wide fittings are available.
Clarks to On → · On chart · Clarks chart · Brand finder
What is a On 9 in Clarks?
A On 9 is about a Clarks 8.5 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do On and Clarks fit the same?
No — On runs true to size and Clarks runs large, so size down half a size when you switch.
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