A4 Cardboard Boxes - 50-Piece Set, Perfect for Yu-Packet Post, the Maximum Size ★ These cardboard boxes can be used as packing materials for Click Post, Yu-Packet (Post), Yu-Pack, and 60-size home delivery services. They meet the standards for non-standard mail. Size: Internal - Length 33.2cm x Width 23cm x Thickness 2.6cm External - Length 33.5cm x Width 23.4cm x Thickness 2.9cm Thickness: 1.1mm Total of the three external dimensions: 60 cm Color: Brown Weight: 97 g per box ※ The boxes will be shipped folded and wrapped in packing material. ※ Please note that the shorter side will be folded in the opposite direction. ※ Please be aware that there may be corner bends, dents, or wrinkles due to the nature of paper products during delivery. If you wish to combine shipping with other items, please consult with us via comment before purchasing. We do not accept combined shipping after purchase.