The boxes are fairly thin on their own, these work fine as long as you put padding inside boxes. The cardboard is very sturdy and they are versatile with the ability to vary the thickness of the box.
WHITE C4 A4 CD DVD BOX LARGE LETTER CARDBOARD SHIPPING MAILING POSTAL BOXES PIP
50 Pack Corrugated Pizza Box - Kraft Cardboard (14" x 14") 14" x 14"
300x Cardboard Postal Boxes 295x210x70mm – Brown Shipping Packing Boxes
C4 A4 Large Letter PIP Boxes Shipping Mailing Cardboard Postal Packaging Boxes
10 Bankers Box Large Cardboard House Moving Boxes Removal Packing Shipping
