The Mexican shoe size for men usually starts with a size 19, representing a 19 cm foot measurement. This is equivalent to a US size 0.5 for mens, which is 7 ⅔ inches. Mexican shoe sizes for men, in general, includes sizes 19, 19.5, 20, 20.5 and so on until a size 34 which is a US 15.5 and measures 12 ⅔ inches.