how shoes are sized
It's actually surprisingly complicated when you'd think it would be fairly simple! Wikipedia lays out the formula nicely (http://en.wikipedia.org/wiki/Sho...), but here's the gist: To determine the male shoe size, you take the measurement of your foot in inches, multiply it by 3 and then subtract 24. This calculation actually changes for athletic shoes, which is apparently: male shoe size (athletic) = foot length in centimetres â 18.