Birkenstock vs Crocs
Detailed size comparison between Birkenstock and Crocs. See side-by-side charts to find out which brand runs bigger or smaller.
💡Quick Answer
Birkenstock Birkenstock runs true to size, while Crocs Crocs runs large - size down. Compare the CM measurements in the charts below for the most accurate fit comparison between brands.
Men's Sizing Comparison
Birkenstock
| US | UK | EU | CM |
|---|---|---|---|
| 3.5 | 3 | 36 | 22 |
| 4 | 3.5 | 36.5 | 22 |
| 4.5 | 4 | 37 | 22.5 |
| 5 | 4.5 | 37.5 | 23 |
| 5.5 | 5 | 38 | 23.5 |
| 6 | 5 | 38 | 23.7 |
| 6.5 | 5.5 | 38 | 24.1 |
| 7 | 6 | 39 | 24.6 |
| 7.5 | 6.5 | 39.5 | 25 |
| 8 | 7 | 40 | 25.4 |
| 8.5 | 7.5 | 40.5 | 25.8 |
| 9 | 8 | 42 | 26.2 |
| 9.5 | 8.5 | 42 | 26.7 |
| 10 | 9 | 43 | 27.1 |
| 10.5 | 9.5 | 43.5 | 27.5 |
| 11 | 10 | 44 | 27.9 |
| 11.5 | 10.5 | 44.5 | 28.4 |
| 12 | 11 | 45 | 28.8 |
| 12.5 | 11.5 | 46 | 29.2 |
| 13 | 12 | 47 | 29.6 |
| 13.5 | 12.5 | 47 | 30.1 |
| 14 | 13 | 48 | 30.5 |
| 14.5 | 13.5 | 48.5 | 30.9 |
| 15 | 14 | 49 | 31.3 |
| 15.5 | 14.5 | 49.5 | 31.8 |
| 16 | 15 | 51 | 32.2 |
Birkenstock runs true to size
Crocs
| US | UK | EU | CM |
|---|---|---|---|
| 3.5 | 3 | 36 | 22 |
| 4 | 3.5 | 36.5 | 22 |
| 4.5 | 4 | 37 | 22.5 |
| 5 | 4.5 | 37.5 | 23 |
| 5.5 | 5 | 38 | 23.5 |
| 6 | 5 | 38 | 23.7 |
| 6.5 | 5.5 | 38 | 24.1 |
| 7 | 6 | 39 | 24.6 |
| 7.5 | 6.5 | 39.5 | 25 |
| 8 | 7 | 40 | 25.4 |
| 8.5 | 7.5 | 40.5 | 25.8 |
| 9 | 8 | 42 | 26.2 |
| 9.5 | 8.5 | 42 | 26.7 |
| 10 | 9 | 43 | 27.1 |
| 10.5 | 9.5 | 43.5 | 27.5 |
| 11 | 10 | 44 | 27.9 |
| 11.5 | 10.5 | 44.5 | 28.4 |
| 12 | 11 | 45 | 28.8 |
| 12.5 | 11.5 | 46 | 29.2 |
| 13 | 12 | 47 | 29.6 |
| 13.5 | 12.5 | 47 | 30.1 |
| 14 | 13 | 48 | 30.5 |
| 14.5 | 13.5 | 48.5 | 30.9 |
| 15 | 14 | 49 | 31.3 |
| 15.5 | 14.5 | 49.5 | 31.8 |
| 16 | 15 | 51 | 32.2 |
Crocs runs large - size down
Women's Sizing Comparison
Birkenstock
| US | UK | EU | CM |
|---|---|---|---|
| 3.5 | 2.5 | 35 | 21.5 |
| 4 | 3 | 35 | 22 |
| 4.5 | 3.5 | 35 | 22.4 |
| 5 | 3 | 35 | 22 |
| 5.5 | 3.5 | 35.5 | 22.4 |
| 6 | 4 | 36.5 | 22.9 |
| 6.5 | 4.5 | 37 | 23.3 |
| 7 | 5 | 37.5 | 23.7 |
| 7.5 | 5.5 | 38 | 24.1 |
| 8 | 6 | 39 | 24.6 |
| 8.5 | 6.5 | 39.5 | 25 |
| 9 | 7 | 40 | 25.4 |
| 9.5 | 7.5 | 40.5 | 25.8 |
| 10 | 8 | 41.5 | 26.2 |
| 10.5 | 8.5 | 42 | 26.7 |
| 11 | 9 | 42.5 | 27.1 |
| 11.5 | 9.5 | 43.5 | 27.5 |
| 12 | 10 | 44 | 27.9 |
| 12.5 | 10.5 | 44.5 | 28.4 |
| 13 | 11 | 45 | 28.8 |
| 13.5 | 11.5 | 46 | 29.2 |
| 14 | 12 | 46.5 | 29.6 |
| 14.5 | 12.5 | 47 | 30.1 |
| 15 | 13 | 47.5 | 30.5 |
Crocs
| US | UK | EU | CM |
|---|---|---|---|
| 3.5 | 2.5 | 35 | 21.5 |
| 4 | 3 | 35 | 22 |
| 4.5 | 3.5 | 35 | 22.4 |
| 5 | 3 | 35 | 22 |
| 5.5 | 3.5 | 35.5 | 22.4 |
| 6 | 4 | 36.5 | 22.9 |
| 6.5 | 4.5 | 37 | 23.3 |
| 7 | 5 | 37.5 | 23.7 |
| 7.5 | 5.5 | 38 | 24.1 |
| 8 | 6 | 39 | 24.6 |
| 8.5 | 6.5 | 39.5 | 25 |
| 9 | 7 | 40 | 25.4 |
| 9.5 | 7.5 | 40.5 | 25.8 |
| 10 | 8 | 41.5 | 26.2 |
| 10.5 | 8.5 | 42 | 26.7 |
| 11 | 9 | 42.5 | 27.1 |
| 11.5 | 9.5 | 43.5 | 27.5 |
| 12 | 10 | 44 | 27.9 |
| 12.5 | 10.5 | 44.5 | 28.4 |
| 13 | 11 | 45 | 28.8 |
| 13.5 | 11.5 | 46 | 29.2 |
| 14 | 12 | 46.5 | 29.6 |
| 14.5 | 12.5 | 47 | 30.1 |
| 15 | 13 | 47.5 | 30.5 |
Kids/Youth Sizing Comparison
Birkenstock
| US | UK | EU | CM |
|---|---|---|---|
| 1 | 0.5 | 16 | 10.5 |
| 1.5 | 1 | 17 | 11 |
| 2 | 1.5 | 18 | 11.5 |
| 2.5 | 2 | 19 | 12 |
| 3 | 2.5 | 20 | 12.5 |
| 3.5 | 3 | 21 | 13 |
| 4 | 3.5 | 22 | 13.5 |
| 4.5 | 4 | 23 | 14 |
| 5 | 4.5 | 24 | 14.5 |
| 5.5 | 5 | 25 | 15 |
| 6 | 5.5 | 26 | 15.5 |
| 6.5 | 6 | 27 | 16 |
| 7 | 6.5 | 28 | 16.5 |
| 7.5 | 7 | 29 | 17 |
| 8 | 7.5 | 30 | 17.5 |
| 8.5 | 8 | 31 | 18 |
| 9 | 8.5 | 32 | 18.5 |
| 9.5 | 9 | 33 | 19 |
| 10 | 9.5 | 34 | 19.5 |
| 10.5 | 10 | 35 | 20 |
| 11 | 10.5 | 36 | 20.5 |
| 11.5 | 11 | 37 | 21 |
| 12 | 11.5 | 38 | 21.5 |
| 12.5 | 12 | 39 | 22 |
| 13 | 12.5 | 40 | 22.5 |
| 13.5 | 13 | 41 | 23 |
| 1 | 12.5 | 32 | 19.5 |
| 1.5 | 13 | 32 | 19.9 |
| 2 | 13.5 | 32.5 | 20.3 |
| 2.5 | 1 | 33 | 20.7 |
| 3 | 2 | 34 | 21.2 |
| 3.5 | 2.5 | 34.5 | 21.6 |
| 4 | 3 | 35 | 22 |
| 4.5 | 3.5 | 35.5 | 22.4 |
| 5 | 4 | 36.5 | 22.9 |
| 5.5 | 4.5 | 37 | 23.3 |
| 6 | 5 | 37.5 | 23.7 |
Crocs
| US | UK | EU | CM |
|---|---|---|---|
| 1 | 0.5 | 16 | 10.5 |
| 1.5 | 1 | 17 | 11 |
| 2 | 1.5 | 18 | 11.5 |
| 2.5 | 2 | 19 | 12 |
| 3 | 2.5 | 20 | 12.5 |
| 3.5 | 3 | 21 | 13 |
| 4 | 3.5 | 22 | 13.5 |
| 4.5 | 4 | 23 | 14 |
| 5 | 4.5 | 24 | 14.5 |
| 5.5 | 5 | 25 | 15 |
| 6 | 5.5 | 26 | 15.5 |
| 6.5 | 6 | 27 | 16 |
| 7 | 6.5 | 28 | 16.5 |
| 7.5 | 7 | 29 | 17 |
| 8 | 7.5 | 30 | 17.5 |
| 8.5 | 8 | 31 | 18 |
| 9 | 8.5 | 32 | 18.5 |
| 9.5 | 9 | 33 | 19 |
| 10 | 9.5 | 34 | 19.5 |
| 10.5 | 10 | 35 | 20 |
| 11 | 10.5 | 36 | 20.5 |
| 11.5 | 11 | 37 | 21 |
| 12 | 11.5 | 38 | 21.5 |
| 12.5 | 12 | 39 | 22 |
| 13 | 12.5 | 40 | 22.5 |
| 13.5 | 13 | 41 | 23 |
| 1 | 12.5 | 32 | 19.5 |
| 1.5 | 13 | 32 | 19.9 |
| 2 | 13.5 | 32.5 | 20.3 |
| 2.5 | 1 | 33 | 20.7 |
| 3 | 2 | 34 | 21.2 |
| 3.5 | 2.5 | 34.5 | 21.6 |
| 4 | 3 | 35 | 22 |
| 4.5 | 3.5 | 35.5 | 22.4 |
| 5 | 4 | 36.5 | 22.9 |
| 5.5 | 4.5 | 37 | 23.3 |
| 6 | 5 | 37.5 | 23.7 |
Verdict
When comparing Birkenstock to Crocs, pay attention to the CM/JP measurements as they are the most accurate way to compare fit across brands.
Birkenstock: Birkenstock runs true to size
Crocs: Crocs runs large - size down
Frequently Asked Questions
Which runs bigger, Birkenstock or Crocs?
Birkenstock Birkenstock runs true to size, while Crocs Crocs runs large - size down. Compare the CM measurements in the charts above for the most accurate fit comparison.
Are Birkenstock and Crocs sizes the same?
While both brands use standard sizing systems (US, UK, EU), the actual fit can vary. Birkenstock Birkenstock runs true to size, and Crocs Crocs runs large - size down. Always check the CM measurements for accurate comparison.
Should I buy the same size in Birkenstock and Crocs?
Not necessarily. Even if you wear the same numerical size, the fit may differ between brands. Use the CM/foot length measurement from our charts to find your true size in each brand.
How do I convert my Birkenstock size to Crocs?
Find your Birkenstock size in the chart above, note the CM measurement, then find that same CM measurement in the Crocs chart. This ensures the most accurate size match between brands.
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