This strap helps position and hold the patient in place. SIZE: 56 1/2" x 3 1/2" x 1/4" Akton® measures 38 1/2" x 3 1/4" x 1/4" (143.5 x 8.9 x 0.6 cm, AKTON measures 98 x 8.2 x 0.6 cm)