Shop / All Moving Supplies / Moving Boxes / Box – 4 Cube “Mattress Bag – King” has been added to your cart. View cart Box – 4 Cube$6.00 Description 18″ L x 18″ W x 21″ H * Type in your Quantity below or click the - / + to change your Quantity. Box - 4 Cube quantity Add to cart Related products Box – 6 Cube $8.00 Box - 6 Cube quantity Add to cart Packing Paper – 10 lb. $20.00 Packing Paper - 10 lb. quantity Add to cart Mattress Bag – Single $8.00 Mattress Bag - Single quantity Add to cart