Adidas vs New Balance Shoe Size Comparison
New Balance runs about half a US size larger than Adidas, so you may need to size down. The gap is about 4mm in measured shoe length plus each brand fit bias. Use the table below to convert any Adidas US size to a starting size in New Balance, with UK, EU and CM alongside.
Adidas to New Balance size chart
| Adidas US | New Balance US | New Balance range | New Balance UK | New Balance EU | New Balance CM |
|---|---|---|---|---|---|
| 7 | 6.5 | 5.5-7.5 | 5.5 | 36 | 24 |
| 8 | 7.5 | 6.5-8.5 | 6.5 | 37 | 25 |
| 9 | 8.5 | 7.5-9.5 | 7.5 | 39 | 26 |
| 10 | 9.5 | 8.5-10.5 | 8.5 | 40 | 26.5 |
| 11 | 10.5 | 9.5-11.5 | 9.5 | 41 | 27.5 |
| 12 | 11.5 | 10.5-12.5 | 10.5 | 43 | 28.5 |
| 13 | 12.5 | 11.5-13.5 | 11.5 | 44 | 29 |
Data confidence
Why Adidas and New Balance differ
That works out to roughly 4mm 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.