1. Place a sheet of paper on the floor and against a wall.
2. Wearing your socks, stand on the sheet of paper with your foot perpendicular to the wall and your heel against the wall.
3. Then use a pen to draw a line just in front of your big toe. Repeat for both feet and take the longer distance to determine your size.
4. Using a ruler, measure the distance between the wall and the line you drew to find your size.

^*Please consider that this size table was defined with CRISPI® technical socks.