Since feet tend to swell over the course of the day, it's best to take your measurements in the afternoon.How? Follow these steps:

1. Wear your regular socks, the ones you would normally wear.
2. Stand on a hardsurface with a white sheet under your foot.
3. Distribute your weight evenly on both feet.
4. Trace the outline of your foot with a pen.
5. Use a ruler or rigid tape measure to measure the length: from the heel to the longest toe (which is not always the big toe).
6. Repeat for both feet and consider the longer measurement .
7. Compare the length with the sizes in the table below.