On Running

Our tool compares official On Running size charts to find your perfect size. No measuring needed.

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Frequently Asked Questions About On Running Sizing
No, On Running sizing varies by model. Some On Running styles run small while others run large. Check our model-specific guides below for exact fit information.
Use our On Running size conversion charts above. On Running 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.
On Running 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.
On Running fit varies by model. Browse our model-specific sizing guides below to see which On Running shoes run small, true to size, or large. Each guide includes exact fit adjustments.