Twin-Pack 8 Stretch Fasteners / Grippers. * Keeps a firm grip on your ironing board covers and/or bed sheets. * Of the pack of four, three are 7" long x 1/2" wide and one is 5 1/2" long x 1/2" wide when in an unstretched position. * Alligator teeth clip on easily and hold firmly. * These are EXCELLENT bed sheet grippers.