Sturdy boxes: Shipping boxes are made of kraft corrugated cardboard, 32 ECT grade, they are strong enough to shipping small and lightweight items. Package: The package comes with 25 packs shipping boxes, each 12x4x3 box is flattened and packed in an outer box to save space. Multi-Use: The 12x4x3 inches white cardboard boxes are for small business, retailers, packing, storing, mailing, and shipping small items. Quick Assemble: Unfold the mailing boxes, the 12x4x3 white shipping boxes are easy to fold with tape in seconds. Packing Boxes: Decorate the 12x4x3 shipping boxes with ribbons, labels, or stickers to create a unique box for your family and friends. Hoikwo 12x4x3 Shipping Boxes Set of 25, White Corrugated Cardboard Box for Small Business for Packaging Mailing