The ankle measurement device. A. Prototype of the ankle measurement device. B. Positioning phase of the right leg of a patient: the knee has already been fixed to the metallic fork; the forefoot has already been fixed to link 6 of the device; the rearfoot has been inserted in the ad hoc mould, and it only needs to be further fixed with Velcro stripes; the shank has already been aligned with link 0 of the device. C. Detail of a completed foot fixing.