Nike vs Converse Shoe Size — Which Runs Smaller?
Nike runs about half a US size large compared to Converse. If you wear Nike in US 9, start by checking Converse in US 9.5. 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 Converse US 9.5. In plain terms: when moving from Nike to Converse, go up half a US size.
- Nike: runs small signal from 55% 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.
Nike → Converse size chart
| US Men (Nike) | Nike → Converse | Foot length |
|---|---|---|
| 7 | 7.5 | 246mm |
| 8 | 8.5 | 254mm |
| 9 | 9.5 | 262mm |
| 10 | 10.5 | 271mm |
| 11 | 11.5 | 279mm |
Fit verdict
- Nike: Runs small (55% of buyers)
- Converse: Runs small (65% of buyers)
Why the sizes differ
Nike runs ~0.5 size larger than Converse.
Nike 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 half a US size because of each brand's fit bias — not a different conversion formula.