Classic Leather vs Nano X
Both are Reebok models but they fit differently: Nano X runs about 0.5 size s larger than Classic Leather at the same labelled US size.
At US men's 9 on Classic Leather
If you wear Classic Leather in US 9, start with Nano X in US 8.5: go down 0.5 US sizes. The calculation keeps the same foot length anchor, about 260mm, then removes the Classic Leather fit offset (-0.25) and applies the Nano X fit offset (+0).
| Model | Recommended US | Foot mm | UK | EU | CM |
|---|---|---|---|---|---|
| Classic Leather | 9 | 260 | 7.5 | 39 | 26 |
| Nano X (equivalent) | 8.5 | 260 | 7.5 | 39 | 26 |