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 courier services. They are within the standard size 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 folded boxes will be wrapped in packing material for shipping. ※ Please note that the shorter side will be folded in the opposite direction from the usual. ※ Please be aware that there may be corner bends, dents, or wrinkles upon delivery due to the nature of paper products. 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.