Size Guide - Birkenstock Regular
| EU | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 |
| Length (mm) | 230 | 240 | 245 | 250 | 260 | 265 | 270 | 280 | 285 | 290 | 300 |
| Width (mm) | 91 | 93 | 95 | 97 | 99 | 101 | 102 | 103 | 107 | 109 | 113 |
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| EU | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 |
| Length (mm) | 230 | 240 | 245 | 250 | 260 | 265 | 270 | 280 | 285 | 290 | 300 |
| Width (mm) | 91 | 93 | 95 | 97 | 99 | 101 | 102 | 103 | 107 | 109 | 113 |