The 25 Pack 9x6x4 Shipping Boxes are made of kraft corrugated cardboard lightweight but sturdy which are great for mailing small items.There are set of 25 shipping boxes flatted in a big box to save space. The 9x6x4 inches shipping box is perfect for moving great for storage durable for shipping. The 9x6x4 cardboard boxes can be folded in seconds without tape glue or staples.Blank boxes are the ideal option for the DIY can be painted and printed as you may wish such as logo.