The frame arrives pre-assembled - fit the wheels and it is ready, no shelf-by-shelf build - and it folds to 3.5 in thick when the shelving is not needed. Open, it stands 28 x 13.5 x 49.5 in with shelf gaps of 14.5, 13.5 and 13.5 in and holds 135 lbs in total. All-metal construction weighs 19.5 lbs. Lockable wheels let it roll between a pantry, a garage and a utility room and then stay put. Black finish resists scuffing where a painted wooden unit would mark.