Heavy Duty Shipping Poly Mailer Bags A4 Horizontal 250mm x Vertical 340mm + Flap 50mm, 50 Sheets ★ Convenient for packing and shipping for Click Post, Yu-Packet (Post), and non-standard size mail, etc. The inside is black or gray, so the contents are not see-through. Size: Horizontal 250mm x Vertical 340mm + Flap 50mm Thickness: 0.06mm Color: Outside - White, Inside - Black / Gray With tape Weight: Approximately 12g/sheet Material: Low-density polyethylene ■ Due to manufacturing, the size of each sheet is not uniform, and there may be errors. Returns and exchanges due to size differences will not be accepted except for significant errors. Please purchase a size with some extra space. ■ The product's color may appear different from the actual product depending on your monitor. ■ Please note that the material and color may change without notice depending on the production lot. ■ Especially when the product arrives, you may notice a unique odor of the LPDE material. ■ As this is an imported product, creases may be present upon arrival due to manufacturing or transportation. ■ The product will be folded in half, placed in a plastic bag, and then shipped in a shipping poly mailer bag. ■ Please understand the above before placing your order.