1. Place foot on paper
The correct position is standing up. Hold the pen as shown, tracing the line exactly where the foot touches the paper or you can get a higher number.
2. Measure the distance
The distance between the most distant two points: your thumb toe and heel with a ruler. Round the result to 0.5 (for example 22.2 to 22, 30.8 to 31 or 24.4 to 24.5).
3. Measure the width
A and B will be taken for the width. Take the measures in the second half of the day, due to feet swelling. Measure both feet and take the greatest extent.