Double your current shoe storage with Shoe Slotz Storage Units. Clever Shoe Slotz works on existing shelves, shoe racks, or the floor, providing protection and organization, while also displaying shoes so it's easier to find the pair you want. As Seen on TV Clever Shoe Slotz Storage Units can double your current storage space, while also providing better shoe protection and organization Also displays shoes so it's easier to find the pair you want No-slide ridges and a top panel heel guard Work on existing shelves, cabinets, shoe racks, or directly on the floor Ideal for men's, women's, and children's shoe storage Fits up to men size 13 or women size 14.5 shoes, unit expands to hold high heels up to about 4" heels Plastic construction Pack includes 6 storage units, each capable of holding 1 pair of footwear