80x Brand New Removal Packaging Boxes 30″x20″x20 Large Storage Box Double Wall. Manufactured from a strong BC flute Double wall board, these brand new plain standard style corrugated boxes are ideal for packaging and protecting those more fragile items while in storage or transit. Supplied flat packed for easy storage with flaps top and bottom for taping. All of our cardboard products are manufactured using a high percentage of recycled materials and are fully recyclable. Please note imperial measurements have been rounded to the nearest inch, the exact internal size of these boxes are shown in inches and centimetre (cm) in the table below. All dimensions are shown in the format length x width x depth. 30″x 20″x 20. 762 x 508 x 508 mm.