Adidas vs Converse Shoe Size - Which Runs Smaller?

Adidas runs about 1 US size large compared to Converse. If you wear Adidas in US 9, start by checking Converse in US 10. Both brands use the same foot-length measurement; the difference is in the last shape, not the conversion formula.

Adidas to Converse size chart

Starting Converse size to check when you wear Adidas in each US men size.
US Men (Adidas) Adidas -> Converse Foot length
7 8 246mm
8 9 254mm
9 10 262mm
10 11 271mm
11 12 279mm

Fit verdict

  • Adidas: True to size (70% of buyers)
  • Converse: Runs small (65% of buyers)

Why the sizes differ

Adidas runs about 1 US size large compared to Converse, with roughly 8mm between the matched fit records.

Adidas foot length is measured in millimetres, then mapped to US size. The Converse starting size shifts by about 1 US size because of each brand fit bias, not a different conversion formula.