Nike vs Adidas Sizing —
Which Runs Bigger?
Same US size number, different fit. Here's a full model-by-model comparison of how Nike and Adidas sizes compare in real-world wear.
| Nike Model | Adidas Model | Same US Size? | Width Comparison | Verdict |
|---|---|---|---|---|
| Air Force 1 Low | Superstar | Yes — both TTS | AF1 wider | AF1 is roomier overall |
| Dunk Low | Samba OG | No — Dunk: up ½, Samba: down ½ | Samba wider toe box | Different sizes needed for each |
| Air Max 90 | Ultraboost | Yes — both TTS | Similar width | Very comparable fit |
| Jordan 1 | Forum Low | Yes — both TTS | Forum slightly wider | Both true to size, Forum roomier |
| Nike SB Dunk | Gazelle | SB: TTS, Gazelle: down ½ | SB Dunk wider | SB Dunk is the roomier choice |
Do Nike and Adidas use the same sizing?
Nike and Adidas both use the US Men's numbering system, so a size 10 from either brand refers to the same foot length in theory. In practice, the actual fit depends heavily on the specific model. Nike tends to be more consistent model-to-model, while Adidas has more variation — the Samba fits very differently from the Ultraboost despite both being Adidas.
Which brand runs wider — Nike or Adidas?
Adidas lifestyle models like the Samba and Forum generally have a wider toe box than comparable Nike lifestyle shoes. However, Nike's Air Force 1 is one of the widest shoes in the sneaker market. For narrow feet, Nike Dunk Lows and Adidas Gazelles both run narrow and may require sizing up.
If I'm a Nike 10, what size Adidas should I get?
For most Adidas performance models (Ultraboost, NMD), your Nike size is correct. For Adidas lifestyle models like the Samba, Stan Smith, or Gazelle, size down half from your Nike size. Use our converters below for specific model recommendations.