Arc'teryx to La Sportiva shoe size
The short answer
Arc'teryx 5.5 is La Sportiva 36 by the two brands' own charts.
At least one of the two brands publishes no foot length, so the rows line up the US size both charts print. Treat it as the label conversion, not a fit.
| Arc'teryx | Arc'teryx builds it for | La Sportiva, by chart | Same label | La Sportiva builds it for | La Sportiva also prints |
|---|---|---|---|---|---|
| 5 | not published | not made | not published | not published | not published |
| 5.5 | not published | 36 | not published | not published | US women's 5.5 · US men's 4.5 |
| 6 | not published | 37 | not published | not published | US women's 6 · US men's 5 |
| 6.5 | not published | 37.5 | not published | not published | US women's 6.5 · US men's 5.5 |
| 7 | not published | 38 | not published | not published | US women's 7 · US men's 6 |
| 7.5 | not published | 38.5 | not published | not published | US women's 7.5 · US men's 6.5 |
| 8 | not published | 39.5 | not published | not published | US women's 8 · US men's 7 |
| 8.5 | not published | 40 | not published | not published | US women's 8.5 · US men's 7.5 |
| 9 | not published | 40.5 | not published | not published | US women's 9 · US men's 8 |
| 9.5 | not published | 41 | not published | not published | US women's 9.5 · US men's 8.5 |
| 10 | not published | 42 | not published | not published | US women's 10 · US men's 9 |
| 10.5 | not published | 42.5 | not published | not published | US women's 10.5 · US men's 9.5 |
| 11 | not published | 43 | not published | not published | US women's 11 · US men's 10 |
| 11.5 | not published | not made | not published | not published | not published |
| 12 | not published | not made | not published | not published | not published |
| 12.5 | not published | not made | not published | not published | not published |
| 13 | not published | not made | not published | not published | not published |
| 13.5 | not published | not made | not published | not published | not published |
| 14 | not published | not made | not published | not published | not published |
| 14.5 | not published | not made | not published | not published | not published |
| 15 | not published | not made | not published | not published | not published |
What wearers say
Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.
Sources
- Arc'teryx size guide, read on 2026-09-18.
- La Sportiva size guide, read on 2026-09-17. La Sportiva on TrueToSize