The 5.0 cube is a Large carton. Some shoppers will opt to purchase this because they believe larger cartons simplifying packing. But remember: the carton has to be 'movable'on moving day. If a carton weighs more than 50#, then a professional mover will decline to move it (it's too heavy, could be harmful to back health). So: if your customers are purchasing cartons 5 cube or larger, ask them what they will be using it for. By helping them to understand the usage of the box, you will make their move less stressful, easier, and faster.