| US Men Size | Foot Length (in) | Ball Girth (in) |
|---|---|---|
| 7 | 9.4–9.6 | 8.6–8.8 |
| 8 | 9.8–10.0 | 8.8–9.0 |
| 9 | 10.2–10.4 | 9.0–9.2 |
| 10 | 10.6–10.8 | 9.2–9.4 |
| 11 | 11.0–11.2 | 9.4–9.6 |
| 12 | 11.4–11.6 | 9.6–9.8 |
| US Women Size | Foot Length (in) | Ball Girth (in) |
|---|---|---|
| 6 | 8.7–8.9 | 7.9–8.1 |
| 7 | 9.1–9.3 | 8.1–8.3 |
| 8 | 9.5–9.7 | 8.3–8.5 |
| 9 | 9.9–10.1 | 8.5–8.7 |
| 10 | 10.3–10.5 | 8.7–8.9 |
| 11 | 10.7–10.9 | 8.9–9.1 |
* All measurements are in inches. Measure foot length while standing with weight on your feet.
* For hiking & climbing use, we recommend sizing up 0.5 size to accommodate thick socks and foot swelling.
* Actual fit may vary by shoe last, toe box shape and material rigidity.
Here’s to warm feet, not warmer winters. Our original hybrid comfort shoe is lighter in weight and lighter on the planet – and 1% of the proceeds from every pair supports Protect Our Winters climate advocacy.


