EU to US Shoe Size Conversion
EU 42 typically maps to US men's 9, but the reverse conversion is approximate because EU rounds on the Paris-point scale. Always confirm with foot length in millimetres — the one axis every system agrees on — and check brand fit notes before buying.
Try the conversion
| Foot length (mm) | US Men | US Women | UK | EU | CM |
|---|---|---|---|---|---|
| 253 | 8 | 9.5 | 7 | 38 | 25.5 |
| 260 | 8.5 | 10 | 7.5 | 39 | 26 |
| 267 | 9.5 | 11 | 8.5 | 40 | 26.5 |
| 273 | 10 | 11.5 | 9 | 41 | 27.5 |
| 280 | 11 | 12.5 | 10 | 42 | 28 |
| 287 | 12 | 13.5 | 11 | 43 | 28.5 |
| 293 | 12.5 | 14 | 11.5 | 44 | 29.5 |
| 300 | 13.5 | 15 | 12.5 | 45 | 30 |
| 307 | 14.5 | 16 | 13.5 | 46 | 30.5 |
Quick conversion table
| EU | US Men | Foot (mm) |
|---|---|---|
| 38 | 8 | 253 |
| 39 | 8.5 | 260 |
| 40 | 9.5 | 267 |
| 41 | 10.5 | 273 |
| 42 | 11 | 280 |
| 43 | 12 | 287 |
| 44 | 12.5 | 293 |
| 45 | 13.5 | 300 |
| 46 | 14 | 307 |
Formula (Layer A): US men ≈ round_to_half((EU / 1.5 × 10 / 25.4 × 3) − 22). See how we calculate for the full methodology.
How to read this conversion
The anchor row converts EU 42 to 280mm first, then displays it as US Men 11. That millimetre anchor is why the same size can be compared against brand and model fit without re-entering the number.
- Foot length in millimetres is the pivot; brand fit is applied later on brand and model pages.
- EU labels are rounded to whole Paris-point sizes, so half-size precision is lost after conversion.
- US men's labels use the barleycorn formula, then round to the nearest half size.
Save this conversion as your size passport
Save your foot length once, then compare brand and model sizing without retyping it.
Local-only by default. Share links include foot length, width and note in the URL, so use them only with people you trust.
What is EU 42 in US shoe size?
EU 42 typically maps to US men's 9 — approximate because EU rounds on the Paris-point scale. Confirm with foot length in mm.
Brand-specific sizing (Layer B)
Generic charts ignore fit — Nike runs small, New Balance runs large, Converse runs very small. For a purchase-ready answer with confidence score and sources:
Compare brand fit before buying
Length conversion gets you the starting size. Brand fit can still move the label by a half size.
Reverse conversion
Need the other direction? Use US to EU Shoe Size Conversion.