The Rolyan Foot Elevator/Positioner has a wide base that discourages internal/external hip rotation and maintains space between the heel and bed, preventing skin breakdown on the heel. The dense polyurethane foam resists bottoming out, while the plantar straps secure foot position. The base of the foam is 12” wide x 6” deep and it is about 8 ½” tall. The 12” width tapers to 6” for the top half. The hole for the ankle is about 3 ½” diameter.