👟 Brand to Brand
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.
A Dr. Martens 8.5 works out to a On 9 — about half a size up. The chart below has every size.
Dr. Martens → On: size up half a size
A Dr. Martens 8.5 is a On 9.
Find your Dr. Martens size on the left, read across for On:
| Dr. Martens size | On size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6 | 6.5 | 5.5 | 37 | 23.5 |
| 6.5 | 7 | 6 | 38 | 24.3 |
| 7 | 7.5 | 6.5 | 38.5 | 24.7 |
| 7.5 | 8 | 7 | 39.5 | 25.1 |
| 8 | 8.5 | 7.5 | 41 | 25.9 |
| 8.5 | 9 | 8 | 41.5 | 26.3 |
| 9 | 9.5 | 8.5 | 42.5 | 26.7 |
| 9.5 | 10 | 9 | 43 | 27.1 |
| 10 | 10.5 | 9.5 | 43.5 | 27.5 |
| 10.5 | 11 | 10 | 44 | 27.9 |
| 11 | 11.5 | 10.5 | 44.5 | 28.3 |
| 11.5 | 12 | 11 | 45.5 | 28.7 |
| 12 | 12.5 | 11.5 | 46 | 29.1 |
| 12.5 | 13 | 12 | 47 | 29.5 |
| 13 | 13.5 | 12.5 | 47.5 | 29.9 |
| 13.5 | 14 | 13 | 48 | 30.3 |
| 14 | 14.5 | 13.5 | 49 | 31.1 |
| 14.5 | 15 | 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 8.5 in On?
A Dr. Martens 8.5 is about a On 9 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do Dr. Martens and On fit the same?
No — Dr. Martens runs large and On runs true to size, so size up half a size when you switch.
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