Instructions include sizes as follows: Adult Male 21” x 8 ¾” with adjustments needed to make 8”, Female/Teen 18 ¾” x 8 ¾” with adjustments needed to make 8”, Child 18 ½” x 7 ½”, Toddler 16 x 7 ¼” with adjustments needed to make 6 1/2”, Baby 13 ½” x 5 ½”, Newborn 10 ½” x 5”, Preemie 8 ¼” x 4”.