Converse vs Adidas Shoe Size — Which Runs Smaller?
Converse runs about 1 US size small compared to Adidas. If you wear Converse in US 9, start by checking Adidas in US 8. 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 Adidas US 8. In plain terms: when moving from Converse to Adidas, go down 1 US size.
- Converse: runs small signal from 65% of buyer-fit data.
- Adidas: true to size signal from 70% of buyer-fit data.
- If you know your foot length in millimetres, use the Size Passport above before trusting a label-to-label switch.
Converse → Adidas size chart
| US Men (Converse) | Converse → Adidas | Foot length |
|---|---|---|
| 7 | 6 | 246mm |
| 8 | 7 | 254mm |
| 9 | 8 | 262mm |
| 10 | 9 | 271mm |
| 11 | 10 | 279mm |
Fit verdict
- Converse: Runs small (65% of buyers)
- Adidas: True to size (70% of buyers)
Why the sizes differ
Converse runs ~1 size smaller than Adidas.
Converse foot length is measured in millimetres, then mapped to US size. The Adidas 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.