Jordan vs ASICS Shoe Size — Which Runs Smaller?
Jordan runs about half a US size small compared to ASICS. If you wear Jordan in US 9, start by checking ASICS 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 ASICS US 8.5. In plain terms: when moving from Jordan to ASICS, go down half a US size.
- Jordan: runs small signal from 50% of buyer-fit data.
- ASICS: true to size signal from 75% of buyer-fit data.
- If you know your foot length in millimetres, use the Size Passport above before trusting a label-to-label switch.
Jordan → ASICS size chart
| US Men (Jordan) | Jordan → ASICS | Foot length |
|---|---|---|
| 7 | 6.5 | 246mm |
| 8 | 7.5 | 254mm |
| 9 | 8.5 | 262mm |
| 10 | 9.5 | 271mm |
| 11 | 10.5 | 279mm |
Fit verdict
- Jordan: Runs small (50% of buyers)
- ASICS: True to size (75% of buyers)
Why the sizes differ
Jordan runs ~0.5 size smaller than ASICS.
Jordan foot length is measured in millimetres, then mapped to US size. The ASICS 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.