size
Size Guide
Hiking footwear fitting reference — find your trail-ready fit
Men's Footwear
Hiking boots & trail shoes. CM column shows foot length in centimeters.
| US | UK | EU | CM |
|---|---|---|---|
| 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 | 41.5 | 26.5 |
| 9 | 8 | 42 | 27 |
| 9.5 | 8.5 | 42.5 | 27.5 |
| 10 | 9 | 43 | 28 |
| 10.5 | 9.5 | 43.5 | 28.5 |
| 11 | 10 | 44 | 29 |
| 11.5 | 10.5 | 44.5 | 29.5 |
| 12 | 11 | 45 | 30 |
| 13 | 12 | 46 | 31 |
| 14 | 13 | 47 | 32 |
| 15 | 14 | 48 | 33 |
Women's Footwear
Hiking boots & trail shoes. CM column shows foot length in centimeters.
| US | UK | EU | CM |
|---|---|---|---|
| 5 | 3 | 36 | 21.5 |
| 5.5 | 3.5 | 36.5 | 22 |
| 6 | 4 | 37 | 22.5 |
| 6.5 | 4.5 | 37.5 | 23 |
| 7 | 5 | 38 | 23.5 |
| 7.5 | 5.5 | 38.5 | 24 |
| 8 | 6 | 39 | 24.5 |
| 8.5 | 6.5 | 39.5 | 25 |
| 9 | 7 | 40 | 25.5 |
| 9.5 | 7.5 | 40.5 | 26 |
| 10 | 8 | 41 | 26.5 |
| 10.5 | 8.5 | 41.5 | 27 |
| 11 | 9 | 42 | 27.5 |
Youth Footwear
Little Kid & Big Kid sizes. CM column shows foot length in centimeters.
| US | UK | EU | CM |
|---|---|---|---|
| 10 | 9 | 28 | 16 |
| 11 | 10 | 29 | 17 |
| 12 | 11 | 30 | 18 |
| 13 | 12 | 31 | 19 |
| 1 | 13 | 32 | 20 |
| 2 | 1 | 33 | 21 |
| 3 | 2 | 34 | 22 |
| 4 | 3 | 35 | 23 |
| 5 | 4 | 36 | 24 |
| 6 | 5 | 37 | 25 |
| 7 | 6 | 38 | 25.5 |
Fit & How to Measure
Our footwear is built with a form-hugging heel cup, sculpted midfoot, and a wider forefoot and toe box — and runs true to size. If you wear thick hiking socks, consider sizing up a half size.
- Stand on a sheet of paper with your heel against a wall, wearing the socks you'll hike in.
- Mark the longest toe, then measure the distance to the wall in cm.
- Match the result to the CM column above to find your US size.
- Measure at the end of the day, when feet are at their largest.
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Description
Cold feet can ruin a perfect day on the trail. Our new Thermal Trail Insole has all the comfort and protection of the Trail Hike Insole, with the addition of Solarcore thermal insulation. Developed for NASA, Solarcore's Aerogel technology uses trapped air to provide unparalleled thermal performance.
Insole sizing:
XXS: W's US shoe size 5.5 - 6.5
XS: W's US shoe size 7 - 8
S: W's US shoe size 8.5 - 9.5 / M's US shoe sizes 7 - 8
M: W's US shoe size 10 - 11 / M's US shoe sizes 8.5 - 9.5
L: W's US shoe size 11.5 - 12.5 / M's US shoe sizes 10 - 11
XL: M's US shoe sizes 11.5 - 12.5
XXL: M's US shoe sizes 13 - 14