Reebok vs New Balance Shoe Size — Which Runs Smaller?
Reebok runs about half a US size small compared to New Balance. If you wear Reebok in US 9, start by checking New Balance in US 8.5. Both brands use the same foot-length measurement — the difference is in the last shape, not the conversion formula.
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Switching rule for this pair
At the US 9 anchor, the same 262mm foot maps to New Balance US 8.5. In plain terms: when moving from Reebok to New Balance, go down half a US size.
- Reebok: true to size signal from 60% of buyer-fit data.
- New Balance: runs large signal from 50% of buyer-fit data.
- If you know your foot length in millimetres, use the Size Passport above before trusting a label-to-label switch.
Reebok → New Balance size chart
| US Men (Reebok) | Reebok → New Balance | Foot length |
|---|---|---|
| 7 | 6.5 | 246mm |
| 8 | 7.5 | 254mm |
| 9 | 8.5 | 262mm |
| 10 | 9.5 | 271mm |
| 11 | 10.5 | 279mm |
Fit verdict
- Reebok: True to size (60% of buyers)
- New Balance: Runs large (50% of buyers)
Why the sizes differ
Reebok runs ~0.5 size smaller than New Balance.
Reebok foot length is measured in millimetres, then mapped to US size. The New Balance last fits the same foot, but the starting label shifts by about half a US size because of each brand's fit bias — not a different conversion formula.