This store declares: one size is shot in multiples of 50. If the quantity of a size is less, the shipment will not be made. For areas such as Tibet, Xinjiang, Hainan, and remote regions, shipping is not included. Please carefully consider before making a purchase. If you need to open an invoice, please consult the customer service. This is a factory store. Thank you for your support. There is also a problem of plus or minus, and there will be 1-2 errors per package of 50. It is considered as "manual picking."