 made up of the talus and calcaneus, or heel bone. The talus is the bone that connects the foot to the lower leg bones, which are also called the tibia and fibula. The calcaneus is the largest bone in the foot, and that's what forms the heel. Three bones have a particular relationship to fractures. First of all, the fifth metatarsal bone, which is the bone attached to the pinky toe, and it's simply the most common bone to fracture in the foot because it's the most exposed.