STURDY CONSTRUCTION: Made of 100% recyclable kraft corrugated cardboard, professional-grade, single-walled corrugated mailers are strong and sturdy, ensure safe shipping of your items. EASY TO ASSEMBLE: One-piece shipping boxes fold together in seconds, unfold the boxes and tape up the seams. Strong enough for packing and stay organized. EASILY ORGANIZE AND IDENTIFY: Cardboard boxes are perfect for mailing, retail shipping, gift packing. White shipping boxes are easily labeled with stickers or writed directly on the box for contents identification. PROTECTIVE PACKAGING: Package includes 25 boxes with same size. Boxes are shipped flat inside a larger carton to protect from moisture and other elements while in transit. DIMENSION: Each box is about 7x5x4 inches(17.7x12.7x10.0cm), suitable size for shipping and packing small or lightweight items.