☆ For an additional ¥30, you can upgrade to A4 size with a thickness of 3 cm (white on one side). Please let me know before purchasing. Yamato's Nekopos compatible - Assembly box (4 sheets each → total 8 sheets set) ○ A4 assembly size: (approx.) 308 x 225 x 25mm thick (without opening perforation) ○ B5 assembly size: (approx.) 272 x 197 x 25mm ※ Assembly size is the outer maximum value, and the inner dimensions are each about 2-several mm smaller. Errors may occur depending on the lot. Compatible with Yu-packet and Click Post within the Nekopos standard size, and can also be used for regular mail. Simple cardboard box specifications to protect items, with some compression effect for clothing, etc., reducing anxiety about size measurement. Fold along the folds and pack in an opaque plastic bag. If it doesn't fit in the mailbox, it will be delivered in person. Shipping on weekdays. #riraku materials ← This is the packaging materials page.