Arc'teryx to Skechers shoe size

The short answer

Arc'teryx 11.5 is Skechers 11 or 12 by the two brands' own charts. 3 of 18 Arc'teryx sizes land on a different label at Skechers.

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.

Every Arc'teryx size read across to Skechers. US women's sizes on the left, US women's on the right.
Arc'teryx	Arc'teryx builds it for	Skechers, by chart	Same label	Skechers builds it for	Skechers also prints
5	not published	5	not published	not published	UK 2 · EU 35 · CM / JP 22
5.5	not published	5.5	not published	not published	UK 2.5 · EU 35.5 · CM / JP 22.5
6	not published	6	not published	not published	UK 3 · EU 36 · CM / JP 23
6.5	not published	6.5	not published	not published	UK 3.5 · EU 36.5 · CM / JP 23.5
7	not published	7	not published	not published	UK 4 · EU 37 · CM / JP 24
7.5	not published	7.5	not published	not published	UK 4.5 · EU 37.5 · CM / JP 24.5
8	not published	8	not published	not published	UK 5 · EU 38 · CM / JP 25
8.5	not published	8.5	not published	not published	UK 5.5 · EU 38.5 · CM / JP 25.5
9	not published	9	not published	not published	UK 6 · EU 39 · CM / JP 26
9.5	not published	9.5	not published	not published	UK 6.5 · EU 39.5 · CM / JP 26.5
10	not published	10	not published	not published	UK 7 · EU 40 · CM / JP 27
10.5	not published	10.5	not published	not published	UK 7.5 · EU 40.5 · CM / JP 27.5
11	not published	11	not published	not published	UK 8 · EU 41 · CM / JP 28
11.5	not published	11 or 12	not published	not published	UK 8 · EU 41 · CM / JP 28
12	not published	12	not published	not published	UK 9 · EU 42 · CM / JP 29
12.5	not published	12 or 13	not published	not published	UK 9 · EU 42 · CM / JP 29
13	not published	13	not published	not published	UK 10 · EU 43 · CM / JP 30
13.5	not published	13	not published	not published	UK 10 · EU 43 · CM / JP 30
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

Tinted rows change label or sit between two sizes. 3 sizes have no counterpart on the Skechers chart. Read from the two charts only; no formula and no averaging.

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.

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Sources

Arc'teryx size guide, read on 2026-09-18.
Skechers size guide, read on 2026-09-18. Skechers on TrueToSize

Skechers to Arc'teryx