A men's US shoe size converts to EU through a foot-length-anchored chart, not a fixed formula. As a reference point, a US men's 9 is an EU 42.5.
The men's US-to-EU shoe conversion runs about half a size to a full size apart depending on where you are in the range: a US men's 7 is an EU 40, a US 9 is an EU 42.5, and a US 12 is an EU 46. The EU number is tied to foot length in centimeters, so it doesn't move in perfectly even steps against the US half-sizes.
This chart is built for men's sizing specifically — a women's US number is roughly two sizes larger than a men's US number for the same foot, so don't reuse this table for a women's size without converting genders first.
| US | EU |
|---|---|
| 6 | 39 |
| 6.5 | 39.5 |
| 7 | 40 |
| 7.5 | 40.5 |
| 8 | 41 |
| 8.5 | 42 |
| 9 | 42.5 |
| 9.5 | 43 |
| 10 | 44 |
| 10.5 | 44.5 |
| 11 | 45 |
| 11.5 | 45.5 |
| 12 | 46 |
| 12.5 | 46.5 |
| 13 | 47 |
A men's US 9 is an EU 42.5, corresponding to a foot length of about 27 cm — some brands round this to EU 43.
No — EU sizes are centimeter-anchored, so the gap between consecutive US and EU sizes isn’t perfectly constant across the whole men’s range.
No — women's US sizing runs about two sizes larger than men's US for the same foot length, so this men's chart will give the wrong EU size for a women's US number.