(18"L x 9"W) This folding cardboard splint is covered in 3/8? foam on one side for comfort with a heavy duty cardboard backing for excellent strength. These folding cardboard splints are for use in limb immobilization. These splints feature 5/8? holes for tie downs. Each splint is covered in 3/8? foam on one side which provides increased comfort for the patient. These splints are FDA registered.