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Dr. Martens to On Shoe Size Conversion
Switching from Dr. Martens to On? Dr. Martens runs large and On runs true to size, so the size you order changes. Here's the full chart.
On runs 0.5 size larger than Dr. Martens, so you may need to size down when switching.
Size down 0.5 moving to On
On runs larger — order half a size smaller than your Dr. Martens size.
Find your Dr. Martens size on the left, read across for On:
| Dr. Martens size | On size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 7 | 5.5 | 37 | 23.5 |
| 6.5 | 7 | 5.5 | 37.5 | 23.9 |
| 7 | 7.5 | 6 | 38 | 24.3 |
| 7.5 | 8 | 6.5 | 38.5 | 24.7 |
| 8 | 8.5 | 7 | 39.5 | 25.1 |
| 8 | 8.5 | 7 | 40 | 25.5 |
| 8.5 | 9 | 7.5 | 41 | 25.9 |
| 9 | 9.5 | 8 | 41.5 | 26.3 |
| 9.5 | 10 | 8.5 | 42.5 | 26.7 |
| 10 | 10.5 | 9 | 43 | 27.1 |
| 10.5 | 11 | 9.5 | 43.5 | 27.5 |
| 11 | 11.5 | 10 | 44 | 27.9 |
| 11.5 | 12 | 10.5 | 44.5 | 28.3 |
| 12 | 12.5 | 11 | 45.5 | 28.7 |
| 12.5 | 13 | 11.5 | 46 | 29.1 |
| 13 | 13.5 | 12 | 47 | 29.5 |
| 13.5 | 14 | 12.5 | 47.5 | 29.9 |
| 14 | 14.5 | 13 | 48 | 30.3 |
| 14 | 14.5 | 13 | 48.5 | 30.7 |
| 14.5 | 15 | 13.5 | 49 | 31.1 |
| 15 | 15.5 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Dr. Martens runs about half to a full size large and has no half sizes — size down to the nearest whole. On (On Running) runs true to size for most, with a snug, performance fit.
On to Dr. Martens → · Dr. Martens chart · On chart · Brand finder
What is a Dr. Martens 10.5 in On?
A Dr. Martens 10.5 is about a On 11 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Dr. Martens and On fit the same?
Not quite — On runs about 0.5 size larger than Dr. Martens.
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