This is a set of 5 large chest buttons and 5 back buttons for a school uniform. (These are change buttons with a black plastic base and a cherry blossom mark, used to fasten school uniform buttons from the back.) Back buttons can be easily replaced, even by children. (A separate set with 4 sleeve buttons is also available, so please take a look.) Returns and exchanges are not accepted for this product. (We have handled tens of thousands of back buttons, and under normal handling and use, the back buttons do not easily break. Currently, the production of back buttons is monopolized by one company, and the factory is the same for all school uniform stores, so the strength is, of course, the same. Among the tens of thousands of sales we have made, there was one case where we accepted an exchange because the button was broken upon arrival, but it was clearly broken by force from the inside. Due to the structure, it is not something that breaks from external impact, and it will not break unless excessive force is applied from the inside, so we have decided not to accept returns or exchanges. Thank you for your understanding.) We will send it via Yu-Packet Post Mini, and we will provide a tracking number after shipment. Delivery will be by postal mail to your mailbox, not by hand. Items for which payment is confirmed by 12:00 noon will be shipped the same day. (There are basically no days when we cannot ship, but if there is an urgent matter that prevents us from shipping, we will ship the next day.) Depending on your area, it usually takes 1-3 days after the shipping date to be delivered to your mailbox. Please check the estimated delivery dates from Osaka for Yu-Packet Post Mini on the internet for more details. *New product. *Free shipping. Therefore, please refrain from requesting a discount. (However, if you purchase multiple items at once and they can be shipped together, we will discount the shipping cost, so please consult us before bidding.) No prior purchase application is required, so you can buy it immediately.