Nike vs Brooks Shoe Size Comparison
Brooks runs about half a US size larger than Nike, so you may need to size down. The gap is about 6mm in measured shoe length plus each brand fit bias. Use the table below to convert any Nike US size to a starting size in Brooks, with UK, EU and CM alongside.
Nike to Brooks size chart
| Nike US | Brooks US | Brooks range | Brooks UK | Brooks EU | Brooks CM |
|---|---|---|---|---|---|
| 7 | 6 | 5-7.5 | 5 | 36 | 24 |
| 8 | 7 | 6-8.5 | 6 | 37 | 25 |
| 9 | 8 | 7-9.5 | 7 | 38 | 25.5 |
| 10 | 9 | 8-10.5 | 8 | 40 | 26.5 |
| 11 | 10 | 9-11.5 | 9 | 41 | 27.5 |
| 12 | 11 | 10-12.5 | 10 | 42 | 28 |
| 13 | 12 | 11-13.5 | 11 | 43 | 29 |
Data confidence
Why Nike and Brooks differ
That works out to roughly 6mm of real shoe length. We map every size through foot length in millimetres and then re-apply each brand empirical fit offset, so the comparison reflects how the shoes actually fit rather than how they are labelled.
Brand-level estimate: per-model fit can vary by a full size or more within a brand.