How to take the correct size of your foot to order the right size for your foot:
1 – Put one foot on a piece of paper.
2 – Mark the sheet at the beginning of the heel and at the end of the longest finger.
3 – Measure the distance between the two points and repeat the process for the other foot.
If the size of one of the two feet is slightly larger, use that as a reference measure to make the choice of your size.