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Need Help Finding Your Size?
Get a size recommendation based on the shoes you already own. No guessing. No measuring. Just a better fit.
Does It Run Large or Small?
Allbirds Trail Runners runs 1.5 times larger than other Allbirds shoes and requires a custom size chart, which you find below.
Official Allbirds Size Chart
Allbirds - Half Size - Women
Unsure about your size? Find your size or check out our detailed guide on how to measure your feet.
Fit Type: Runs large
| Shoe Length (mm) | EU |
|---|---|
| 213 | 35 |
| 218 | 35.5 |
| 223 | 36 |
| 228 | 36.5 |
| 233 | 37 |
| 238 | 37.5 |
| 243 | 38 |
| 248 | 38.5 |
| 253 | 39 |
| 258 | 39.5 |
| 263 | 40 |
| 268 | 40.5 |
| 273 | 41 |
Based On: Allbirds :: Official :: Half Size :: Women
Last updated: 2025-09-05 06:35:39