Altra Men's Lone Peak 9 size guide
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Our tool compares official Altra size charts to find your perfect size. No measuring needed.
Does the Altra Men's Lone Peak 9 run small or large?
1 owners of the Altra Men's Lone Peak 9 have reported their size so far, including EU 41. We hold off on fit guidance until enough have reported for it to mean something.
Altra has not published a size chart for the Altra Men's Lone Peak 9. What you see above is the brand's general chart, which covers the whole range rather than this model.
Official Altra Size Chart for Men's Lone Peak 9
This chart covers EU 37 to EU 51.5, which is feet from 21.7 cm to 34 cm long.
This is the official brand-wide Altra size chart. Altra uses the same chart for the Altra Men's Lone Peak 9 as for its other models.
Source missing — we cannot point to the page this chart was published on.
Fetched 2026-11-10 13:48:13
US is not available for this shoe yet, so this is UK.
| Foot Length | UK | EU | US |
|---|---|---|---|
| 21.7 - 22.0 cm | 3 | 37 | 4 |
| 22.0 - 22.5 cm | 3.5 | 37.5 | 4.5 |
| 22.5 - 23.0 cm | 4 | 38 | 5 |
| 23.0 - 23.5 cm | 4.5 | 38.5 | 5.5 |
| 23.5 - 24.0 cm | 5 | 39 | 6 |
| 24.0 - 24.5 cm | 5.5 | 39.5 | 6.5 |
| 24.5 - 25.0 cm | 6 | 40 | 7 |
| 25.0 - 25.5 cm | 6.5 | 40.5 | 7.5 |
| 25.5 - 26.0 cm | 7 | 41 | 8 |
| 26.0 - 26.5 cm | 7.5 | 42 | 8.5 |
| 26.5 - 27.0 cm | 8 | 42.5 | 9 |
| 27.0 - 27.5 cm | 8.5 | 43 | 9.5 |
| 27.5 - 28.0 cm | 9 | 44 | 10 |
| 28.0 - 28.5 cm | 9.5 | 44.5 | 10.5 |
| 28.5 - 29.0 cm | 10 | 45 | 11 |
| 29.0 - 29.5 cm | 10.5 | 46 | 11.5 |
| 29.5 - 30.0 cm | 11 | 46.5 | 12 |
| 30.0 - 30.5 cm | 11.5 | 47 | 12.5 |
| 30.5 - 31.0 cm | 12 | 48 | 13 |
| 31.0 - 32.0 cm | 13 | 49 | 14 |
| 32.0 - 33.0 cm | 14 | 50 | 15 |
| 33.0 - 34.0 cm | 15 | 51.5 | 16 |
Altra publishes this chart as foot length, so the lengths above are the foot each size fits and we use them as published.
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Last updated: 2026-11-10 13:48:13