The Original Shelf-lock: Complete Medicine Cabinet Shelf Guard Kit Including Adhesive to Fit 13&rdquo; to 15&rdquo; Shelves (3-pack) Stop the Drop with SHELF LOCK! Keep everything on the shelves and off of the floor! Attaches to shelves with double sided tape (supplied) to create a barrier so that things stay on the shelves, where they belong. Fits standard 13 to 15 wide medicine cabinet. Includes 3 shelf guards one each size: (13" wide x 2.5" high x 1.5 deep), (13" wide x1.5" high x 1.5" tall), ( 12" wide x 1.5" high x 1.5" deep.) Made from PVC Plastic