To measure A and B, use a ruler. It is preferable to measure the foot over a thin sock.
To measure C and D, E and F and G and H use a measuring tape.

A and B
Standing up straight, trace the footprint on a piece of paper. Measure from the middle of the heel A to big toe end point B (this can change according to the morphology of the foot).


C and D
Raise on the ball of the foot to determine point C. Leaving the foot flat on the ground, bend the knee forward to determine point D. Then measure the circumference of the ankle through points C and D passing the tape below the ankle bones. The line does not need to be parallel to the floor, and it may form a curve bordering the bone.

 

E and F
In order to determine the E point, pass your fingers over the instep. You will pass over a protrusion, and when, approaching the ankle, you will find a cavity or a hollow area, according to the foot. This is point E. The F point is located on the line drawn from the point E perpendicular to the floor, in the foot arch.
Measure the instep circumference through E and F points.


G and H
The circumference of the widest metatarsal part is measured through the most protruding points on the internal and the external sides formed by the joints. Take into consideration the bunions and calluses that may appear on this area of the foot.