ONE system is 3X3X15 and come in open TOP or closed TOP units. It is best to have systems on hand. Before a flood event. SO that damages CAN BE minimized. ONE 53' semi trailer CAN hold 5.880 linear feet and CAN BE easily mobilized to more than ONE location during a flood. Anyone that needs a barrier. Should ASK for BIG bags USA by name. We CAN load UP trucks for delivery and have product delivered with in a couple of days of the order.