The term 'knee-to-ankle bone' refers to the three bones that make up the lower leg: the TIBIA (5 letters), FIBULA (6 letters) and SHIN (4 letters). The TIBIA is the larger of the two bones located on the medial side of the leg, and it runs from the knee to the ankle. The FIBULA is the smaller bone located on the lateral side of the leg, and it also runs from the knee to the ankle. The SHIN is the anterior portion of the leg, and it is located between the TIBIA and FIBULA.