Factory built, 49.5 in wide by 48 in long. Excellent trailer for hauling garden waste (branches, leaves, trimmings) and towing with small car. Light enough to move by hand. Can be used to haul sheet good (plywood) by removing front and back walls. Can be tipped upright to store taking up hardly any room. Takes 2" trailer ball. One taillight lens is broken (repaired with red tape).