The ankle is made up of three bones:
- the tibia (shin bone), which forms the inside, front, and back of the ankle
- the fibula, which forms the outside of the ankle
- the talus, a small bone that sits between the tibia and fibula and the heel bone
The ends of these bones are called malleoli. The tibia has a medial (inside) malleoli and a posterior malleoli. The fibula forms the lateral (outside) malleoli.