I bought these shoes for my brother-in-law in Spain who wears a European size 48. According to the New Balance size chart a size 48 is a size 15, but when I got the shoes, the box said it was a 15/European 50. So I called my sister in Spain and had her measure my brother-in-law's regular shoes, and it turned out that the shoes sent were indeed a 48. The real test will come, when my brother-in-law will try them on. I'll keep my finger's crossed.....