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On to Crocs Shoe Size Conversion
Switching from On to Crocs? On runs true to size and Crocs runs true to size, so the size you order changes. Here's the full chart.
Because On and Crocs share the same fit tendency, your size carries straight across: a On 9 is a Crocs 9.
On and Crocs run the same
Order the same number — a On 9 is a Crocs 9.
Find your On size on the left, read across for Crocs:
| On size | Crocs size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6.5 | 5.5 | 37 | 23.5 |
| 7 | 7 | 6 | 38 | 24.3 |
| 7.5 | 7.5 | 6.5 | 38.5 | 24.7 |
| 8 | 8 | 7 | 39.5 | 25.1 |
| 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 |
| 14.5 | 14.5 | 13.5 | 49 | 31.1 |
| 15 | 15 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. On (On Running) runs true to size for most, with a snug, performance fit. Crocs are sized in unisex M/W and run roomy — between sizes, size down.
Crocs to On → · On chart · Crocs chart · Brand finder
What is a On 9 in Crocs?
A On 9 is about a Crocs 9 — they share a foot length of roughly 26.3 cm (UK 8, EU 41.5).
Do On and Crocs fit the same?
Roughly, yes — both run true to size, so the same number fits.
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