Altra Sizing Chart
Altra footwear sizes convert between US, UK, European and foot-length (cm) sizing. For the most accurate fit, measure your foot in centimeters and cross-reference the CM column below. Altra shoes are built on a FootShape design and are offered in a single standard width.
Men's Footwear Size Conversions:
| US | UK | EU | CM |
|---|---|---|---|
| 4 | 3 | 37 | 22 |
| 4.5 | 3.5 | 37.5 | 22.5 |
| 5 | 4 | 38 | 23 |
| 5.5 | 4.5 | 38.5 | 23.5 |
| 6 | 5 | 39 | 24 |
| 6.5 | 5.5 | 39.5 | 24.5 |
| 7 | 6 | 40 | 25 |
| 7.5 | 6.5 | 40.5 | 25.5 |
| 8 | 7 | 41 | 26 |
| 8.5 | 7.5 | 42 | 26.5 |
| 9 | 8 | 42.5 | 27 |
| 9.5 | 8.5 | 43 | 27.5 |
| 10 | 9 | 44 | 28 |
| 10.5 | 9.5 | 44.5 | 28.5 |
| 11 | 10 | 45 | 29 |
| 11.5 | 10.5 | 46 | 29.5 |
| 12 | 11 | 46.5 | 30 |
| 12.5 | 11.5 | 47 | 30.5 |
| 13 | 12 | 48 | 31 |
| 14 | 13 | 49 | 32 |
| 15 | 14 | 50 | 33 |
| 16 | 15 | 51.5 | 34 |
Fit tip: measure your foot in centimeters and match it to the CM column for the most reliable size. If you are between sizes, size up.
