New Nekopos Size, Maximum Yu-Packet Size! Yu-Packet Post A4 Cardboard Box, 10 Sheets ★This cardboard box can be used as packaging material for Click Post, Yu-Packet (Post), Yu-Pack, and Takkyubin 60 size. It is within the standard size for non-standard mail. Size: Inner dimensions - Length 33.2cm x Width 23cm x Thickness 2.6cm Outer dimensions - Length 33.5cm x Width 23.4cm x Thickness 2.9cm Thickness - 1.1mm Total of the three outer dimensions - 60 cm Color: Brown ※It will be folded and shipped in a宅配ビニール袋 (delivery vinyl bag). ※Please note that the shorter side will be folded in the opposite direction. ※If you assemble it inside out, it may exceed the regulations of the mail service you are using. ※Please understand in advance that there may be corner bends, dents, wrinkles, etc. during delivery due to the nature of the paper product.