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Allbirds to On Shoe Size Conversion
Switching from Allbirds to On? Allbirds runs true to size and On runs true to size, so the size you order stays the same. Here's the full chart.
Because Allbirds and On share the same fit tendency, your size carries straight across: a Allbirds 9.5 is a On 9.5.
Allbirds and On run the same
Order the same number — a Allbirds 9.5 is a On 9.5.
Find your Allbirds size on the left, read across for On:
| Allbirds size | On size | UK | EU | Foot (cm) |
|---|---|---|---|---|
| 6.5 | 6.5 | 5.5 | 37 | 23.5 |
| 6.5 | 6.5 | 5.5 | 37.5 | 23.9 |
| 7 | 7 | 6 | 38 | 24.3 |
| 7.5 | 7.5 | 6.5 | 38.5 | 24.7 |
| 8 | 8 | 7 | 39.5 | 25.1 |
| 8 | 8 | 7 | 40 | 25.5 |
| 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 | 14 | 13 | 48.5 | 30.7 |
| 14.5 | 14.5 | 13.5 | 49 | 31.1 |
| 15 | 15 | 14 | 49.5 | 31.5 |
⚠️ Fit varies by model. Allbirds runs true to size; half sizes are rounded, so go to the nearest whole. On (On Running) runs true to size for most, with a snug, performance fit.
On to Allbirds → · Allbirds chart · On chart · Brand finder
What is a Allbirds 10.5 in On?
A Allbirds 10.5 is about a On 10.5 — they share a foot length of roughly 27.5 cm (UK 9.5, EU 43.5).
Do Allbirds and On fit the same?
Roughly, yes — both run small, so the same number fits.
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