Birkenstock vs On shoe sizing
Compare shoe sizing between Birkenstock and On
Conversion table (Unisex)
| Birkenstock (EU) | On (EU) | Baseline |
|---|---|---|
| 39.0 | 40.0 | cm |
| 40.0 | 41.0 | cm |
| 41.0 | 42.0 | cm |
| 42.0 | 42.5 | cm |
| 43.0 | 44.0 | cm |
| 44.0 | 44.5 | cm |
| 45.0 | 46.0 | cm |
| 46.0 | 47.0 | cm |
| 47.0 | 47.0 | cm |
| 48.0 | 48.5 | cm |
| 49.0 | 50.0 | cm |
| 50.0 | 50.0 | cm |
FAQ
How do I convert Birkenstock to On?
Use the converter above. We map sizes via official chart baselines (cm/EU) when available.
Do these brands run small or large?
Based on official charts, On EU labels are typically +1.0 compared to Birkenstock for similar foot length (cm). Real fit can vary by model.
What if I’m between sizes?
If you prefer a snug fit, lean down; for extra room, lean up - and always check the brand’s model-specific guidance.