Merrell to Brooks shoe size

The short answer

Merrell 8.5 is Brooks 8.5 by the two brands' own charts. 0 of 14 Merrell sizes land on a different label at Brooks.

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 Merrell size read across to Brooks. US women's sizes on the left, US women's on the right.
Merrell	Brooks, by chart	Same label	Brooks also prints
5	5	not published	UK 3 · EU 35.5
5.5	5.5	not published	UK 3.5 · EU 36
6	6	not published	UK 4 · EU 36.5
6.5	6.5	not published	UK 4.5 · EU 37.5
7	7	not published	UK 5 · EU 38
7.5	7.5	not published	UK 5.5 · EU 38.5
8	8	not published	UK 6 · EU 39
8.5	8.5	not published	UK 6.5 · EU 40
9	9	not published	UK 7 · EU 40.5
9.5	9.5	not published	UK 7.5 · EU 41
10	10	not published	UK 8 · EU 42
10.5	10.5	not published	UK 8.5 · EU 42.5
11	11	not published	UK 9 · EU 43
11.5	11.5	not published	UK 9.5 · EU 44

Neither chart publishes the body each size is built for, so the rows line up the labels. Tinted rows change label or sit between two sizes. 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

Merrell size guide, read on 2026-09-18. Merrell on TrueToSize
Brooks size guide, read on 2026-09-17. Brooks on TrueToSize

Brooks to Merrell