Lengths of Foot Orthotics

MPJ—
The length of a foot orthotic’s shell, mid-layer or top cover, which ends near the metatarsal heads

Sulcus—
The length of a foot orthotic’s shell, mid-layer or top cover, which ends just before the toes

Full—
The length of a foot orthotic’s shell, mid-layer or top cover, which extends past the end of the toes