BENEFITS: This Arch Support features a semi-rigid plastic shell that bends to every foot position and offers firm yet comfortable support. The metatarsal pad supports the metatarsal vault, the most sensitive part of the foot. Sizes Available: ( W 5/6) (W 7/8) (W 9/10 M 7/8) (M 9/10) (M 11/12) (M 13/14)