Eli5: Why do shoes have half sizes, rather than double the amount of whole sizes?

Question

Especially cause shoe sizes aren’t really universal anyway, making the half sizes even less meaningful. Why?

In: 193

Answer 1

Using Japanese sizing is a good idea because they use centimeters so it’s a more accurate metric for measuring shoe size, opposed to normal sizes that can vary from manufacturer to manufacturer. Some shoes say “JP” or “CM”. So once you know your shoe size in CM, in theory, you should always find the right fit.