Match sizes by foot length (cm), then check model fit — US labels alone can mislead across brands.
Chart match · verify brand charts(paid link)
Full converter (model + shoes you own) · Reverse: Adidas → Nike
Static conversion table (crawlable). Interactive tool above uses the same cm matching.
| Nike US | cm | Adidas US | Adidas EU |
|---|---|---|---|
| 6.0 | 23.5 | 6.0 | 38.5 |
| 6.5 | 24.0 | 6.5 | 39.0 |
| 7.0 | 24.5 | 7.0 | 40.0 |
| 7.5 | 25.0 | 7.5 | 40.5 |
| 8.0 | 25.4 | 8.0 | 41.0 |
| 8.5 | 25.9 | 8.5 | 42.0 |
| 9.0 | 26.2 | 9.0 | 42.5 |
| 9.5 | 26.7 | 9.5 | 43.0 |
| 10.0 | 27.1 | 10.0 | 44.0 |
| 10.5 | 27.5 | 10.5 | 44.5 |
| 11.0 | 27.9 | 11.0 | 45.0 |
| 11.5 | 28.4 | 11.5 | 45.5 |
| 12.0 | 28.8 | 12.0 | 46.0 |
| 13.0 | 29.7 | 13.0 | 47.5 |
Nike US 10 is 27.1 cm and the nearest Adidas US is also 10 (EU 44). The printed ladder is 1:1 from US 6 (23.5 cm) through US 13 (29.7 cm). The wear-box “Nike 10 ≈ Adidas 10.0” is that centimeter match — it does not say Air Force 1 and Samba share a last. Adidas EU at that US 10 is 44; Nike’s own chart on sibling pages often prints EU 43.5 for the same US 10. Labels can disagree even when the cm column agrees.
Nike lifestyle lasts on this site split hard: AF1 often feels long (many half down); Dunk and Air Max 90 are closer TTS references. Adidas terrace lasts split the other way: Samba OG is TTS length but narrow; Gazelle often feels a half long for narrow/average feet; Ultraboost and Campus 00s follow their own volume. If you already half-down in AF1 and carry that smaller number into Samba because “the chart is 1:1,” you undersize the Adidas shoe.
Use 27.1 cm as the ticket, then pick the model. Convert from Dunk/AJ1 or from the cm column, not from the AF1 tongue. If you size Gazelle down a half, that is a terrace length quirk — do not auto-downsize a Dunk to match it. Half a size on this table is ~4 mm (26.7 → 27.1 → 27.5 cm). Spend it on width (Samba pinch vs Gazelle length), not on stacking two brand habits.
Even when charts match, lasts differ. Check these guides:
Nike: Air Force 1 '07 · Dunk Low · Pegasus 41 · Vomero 5
Adidas: Samba OG · Gazelle · Ultraboost 1.0 · Campus 00s
Also compare Nike to: New Balance · Converse · Vans · Hoka
Check prices: Nike Adidas (paid link)
Clothes sizing uses a separate compare path.