Do all Allbirds shoes fit the same?
No, Allbirds sizing varies by model. Some Allbirds styles run small while others run large. Check our model-specific guides below for exact fit information.
How do I convert Allbirds sizes between EU, US and UK?
Use our Allbirds size conversion charts above. Allbirds uses standard European sizing. EU 40 = US 7 (women) or US 7.5 (men) = UK 6.5. For exact conversions, see the charts on this page.
How does Allbirds sizing compare to Nike or Adidas?
Allbirds uses European sizing which tends to be consistent with other European brands. Compared to Nike or Adidas, you may need to check each model as fit varies. Use our size finder tool for accurate cross-brand comparison.
Which Allbirds models run small or large?
Allbirds fit varies by model. Browse our model-specific sizing guides below to see which Allbirds shoes run small, true to size, or large. Each guide includes exact fit adjustments.