Wide Range of Uses Ideal for self-shipping on Mercari, Rakuma, Yahoo! Auctions, Yahoo! Shopping, Amazon, Rakuten Ichiba, etc. Suitable for packaging not only paperbacks, gifts, accessories, stationery, and small, lightweight items, but also fragile products such as precision instruments, electronic products, cosmetics, skincare products, and household goods. 【Essentials for Mail Order Shipping with Various Carriers】 Compatible with all sizes of Japan Post, Yamato Transport, Sagawa Express's Kuroneko DM-bin, Nekoposu, Yu-Packet, Click Post, and Yu-Mail. ●Product Details Size: 15cm x 18cm + 4cm Color: Yellow * Since there is no gusset, the internal dimensions will change depending on the thickness of the product. * Please choose a size with some extra space. * The example uses are just a guide. Please be sure to check the actual size of your items.