Adidas vs Converse Shoe Size — Which Runs Smaller?
Adidas runs about 1 US size large compared to Converse. If you wear Adidas in US 9, start by checking Converse in US 10. 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 Converse US 10. In plain terms: when moving from Adidas to Converse, go up 1 US size.
- Adidas: true to size signal from 70% of buyer-fit data.
- Converse: runs small signal from 65% of buyer-fit data.
- If you know your foot length in millimetres, use the Size Passport above before trusting a label-to-label switch.
Adidas → Converse size chart
| US Men (Adidas) | Adidas → Converse | Foot length |
|---|---|---|
| 7 | 8 | 246mm |
| 8 | 9 | 254mm |
| 9 | 10 | 262mm |
| 10 | 11 | 271mm |
| 11 | 12 | 279mm |
Fit verdict
- Adidas: True to size (70% of buyers)
- Converse: Runs small (65% of buyers)
Why the sizes differ
Adidas runs ~1 size larger than Converse.
Adidas foot length is measured in millimetres, then mapped to US size. The Converse last fits the same foot, but the starting label shifts by about 1 US size because of each brand's fit bias — not a different conversion formula.