Lightweight durable abs-molded shells provide maximum impact resistance * Four multi-directional spinner wheels for effortless rolling on the 25 inches and 29 inches uprights and you get deluxe in-line skate corner wheels on the 18 inches and 21 inch upright luggage * Top and side carry handles make for easy lifting * Spacious main compartment provides ample packing space for your travel needs * The largest bag measures 29 inches height x 20 inches weight x 12 inches depth, the next largest bag measures 25 inches height x 18 inches weight x 10.5 inches depth, the medium bag measures 21 inches height x 15.5 inches weight x 9.5 inches depth and the smallest bag in this set measures 18 inch