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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 Runner-Up Protect 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
| Size (EU) | Shoe Length (mm) |
|---|---|
| 35 | 213 |
| 35.5 | 218 |
| 36 | 223 |
| 36.5 | 228 |
| 37 | 233 |
| 37.5 | 238 |
| 38 | 243 |
| 38.5 | 248 |
| 39 | 253 |
| 39.5 | 258 |
| 40 | 263 |
| 40.5 | 268 |
| 41 | 273 |
Based On: Allbirds :: Official :: Half Size :: Women
Last updated: 2025-09-05 06:35:39