The longer lateral side of the socket is formed by the lateral malleolus of the fibula.
The articular surfaces are covered by hyaline cartilage.
The articular part of the talus is shaped like a short half-cylinder tipped onto its flat side with one end facing lateral and the other end facing medial. The curved upper surface of the half-cylinder and the two ends are covered by hyaline cartilage and fit into the bracket-shaped socket formed by the distal ends of the tibia and fibula.