Excuse me. Before considering or purchasing, please read both the self-introduction section and the product description section to the end. Comments that show a lack of understanding will be ignored. Conversely, if you don't understand something, please ask. I will reply as quickly as possible when I have time. I will always reply, even if it takes time. Please wait. ○ I would appreciate it if you could leave a comment as I would like to communicate with everyone. This is a set of 20 small envelopes, Yu-Packet Post Mini, that can be easily used with a QR code that everyone has used. They are new and unused. I will take care to prevent water damage and fold them in half for shipping. - Type: Yu-Packet Post Mini - Usage: QR code scanning method - Size: Small envelope - Postal service: Usable with Japan Post The size fits in an envelope and a post box. If you have read both the self-introduction section and the product description section to the end, you are welcome to purchase immediately. Responses will be made the following morning or later if it's late evening or night. I may occasionally respond in the middle of the night or early morning. Thank you for your understanding. ※ Basically, the price includes the item price, shipping, handling fees, and other miscellaneous costs, so I will not offer a discount. The price I offer will not change even if you "like" the item and it continues to be listed. Thank you for your understanding and consideration before purchasing. Thank you for reading this long description.