ASICS vs Puma Shoe Size - Which Runs Smaller?

ASICS and Puma run true to each other. Keep your usual size when switching. If you wear ASICS in US 9, start by checking Puma in US 9. Both brands use the same foot-length measurement; the small differences are in last shape, not the conversion formula.

ASICS to Puma size chart

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

Fit verdict

  • ASICS: True to size (75% of buyers)
  • Puma: True to size (65% of buyers)

Why the sizes differ

ASICS and Puma are close enough to treat as the same size at the brand level. The measured gap is about 0mm.

ASICS foot length is measured in millimetres, then mapped to US size. The Puma starting size stays the same because of each brand fit bias, not a different conversion formula.