How to measure your foot
When measuring your foot, measure from the back of the heel to the front of the toe.
Many people find that one of their feet is slightly longer than the other. Make sure you measure both feet and select a size that will accommodate your longest foot.
Please also keep in mind that natural feet shape and manufacturers use different methods to construct their shoes, any measuring device can only approximate your true shoe size and sizing may vary accordingly to the maker or style.