Buy the right shoe size posted by on July 13, 2011

Each size of shoe is suitable for a small interval of foot lengths and you should know this when doing a shoe size conversion. The inner cavity of a shoe must typically be 15–20 mm longer than the foot, but this relation varies between different types of shoes.

Buying shoes with European sizing is a bit trickier. Your best bet is to try them on. If you are buying online, however, you can use a sizing chart — just make sure there’s a good return policy in case the shoes don’t fit well. The general rule for converting a men’s U.S shoe size to women’s shoe size is add 2 sizes in the original number. Write the number down and round to the hundredths place such, as 10.75 inches.