2 Make sure that you are wearing the same socks as you would typically wear with these kinds of shoes.
3 Wearing these socks, stand on the sheet of paper with your foot perpendicular to the wall and your heel against the wall.
4 Then ask your friend to draw a line just in front of the longest point of your foot. Repeat with both feet and take the longer distance to determine your size.
5 Use a ruler and measure the distance between the wall and the line that you drew to find your size. If you are between sizes, choose the bigger one.