A4 Cardboard Boxes Ideal for Nekopos, Thickness 3cm Compatible! Set of 60 These versatile cardboard boxes can be used as packaging materials for Nekopos, Yu-packet, and Click Post, which are mainly used for flea market shipping. Within the standard size for non-standard mail. Type: Yakko style (envelope style) Size: Inner dimensions - Length 30.8cm x Width 22.3cm x Thickness 2.6cm Outer dimensions - Length 31cm x Width 22.5cm x Thickness 2.9cm Thickness - 1.1mm Total of three outer dimensions - 56 cm Color: Brown * Folded items will be wrapped in packaging material and shipped. * Please note that the shorter side will be folded in the opposite direction from the original. * This is a Yakko style (envelope style) shape that wraps the contents from all four sides. * Easy to work with due to tape closure, and it is the most affordable among mail case, so it is recommended for those who want to reduce costs. * Please purchase only if you can understand that there may be dents during shipping due to the paper product. * The photos are only samples, so the actual product's color and shape may differ slightly from the photos, please understand.