A4 Cardboard Boxes Perfect for Nekopos Shipping! Compatible with 3cm Thickness! Set of 12 These versatile cardboard boxes can be used as packing materials for Nekopos, Yu-packet, and Click Post, which are mainly used for flea market shipping. They are well-made, not cheap and poorly made! They are within the standard size for non-standard mail. Type: Yakko style (envelope style) Size: Internal - Length 30.8cm x Width 22.3cm x Thickness 2.6cm External - Length 31cm x Width 22.5cm x Thickness 2.9cm Thickness - 1.1mm Total of the three external dimensions - 56 cm Color: Brown * They 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. * This is a Yakko style (envelope style) shape that wraps the contents from all four sides. * They are easy to work with because they are taped, and they are the cheapest among mail case, so they are recommended for those who want to reduce costs. * The lid overlaps, so there are no gaps, and it is easy to tape even after putting in the product. * Please note in advance that there may be corner bends, dents, wrinkles, etc. during delivery due to the paper product. * The photos are just samples, so the color and shape of the actual product may differ slightly from the photos, please understand.