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.
Nike to 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 about half a US size large compared to Converse, with roughly 4mm between the matched fit records.
Nike foot length is measured in millimetres, then mapped to US size. The Converse starting size shifts by about half a US size because of each brand fit bias, not a different conversion formula.