ASICS vs Jordan Shoe Size - Which Runs Smaller?

ASICS runs about half a US size large compared to Jordan. If you wear ASICS in US 9, start by checking Jordan in US 9.5. Both brands use the same foot-length measurement; the difference is in the last shape, not the conversion formula.

ASICS to Jordan size chart

Starting Jordan size to check when you wear ASICS in each US men size.
US Men (ASICS) ASICS -> Jordan Foot length
7 7.5 246mm
8 8.5 254mm
9 9.5 262mm
10 10.5 271mm
11 11.5 279mm

Fit verdict

  • ASICS: True to size (75% of buyers)
  • Jordan: Runs small (50% of buyers)

Why the sizes differ

ASICS runs about half a US size large compared to Jordan, with roughly 4mm between the matched fit records.

ASICS foot length is measured in millimetres, then mapped to US size. The Jordan starting size shifts by about half a US size because of each brand fit bias, not a different conversion formula.