Home Basics Wire Shelving Storage Unit (4 Tier, Grey) Maximize your storage space with these, easy to assemble, shelving storage Units Made from heavy duty Steel Construction 3 tier - Height - 32", width - 21", Depth - 13.8" 4 tier - Height - 46.5", width - 21", Depth - 13.8" 5 tier - Height - 61", width - 21", Depth - 13.8"