CAT Cube Nested 3-Pack, Anthracite/Orange, One Size Large outside zipper pockets 4-wheel spinner system on the 28 inch and 24 inch trolleys allow for smooth and effortless movement 20 inch trolley features two wheels 20 inch trolley: 20.5 x 7.9 x 14.6 inches; 24 inch trolley: 15.7 x 23.6 x 9.1 inches; 28 inch trolley: 17.3 x 27.6 x 10.2 inches Tie-down straps to secure belongings