Thank you for your patronage! This is an insert for the Longchamp Le Pliage S size, which has been very popular. This is a handmade item. My specialty is woodworking, but I made this at my daughter's request and it was well-received. Now, both of my daughters and my wife use it. I am offering it at a low price so that everyone can use it. It is made of 0.75mm thick PP sheet. (Matte or glossy finish, depending on the availability of materials.) The corners are rounded to prevent scratches on the bag. It is sufficient for most items that won't cause the bag to lose its shape, and it is said to be very useful. (This thickness is sufficient for this size, but if you prefer two layers, please purchase the separate set of two. We also offer a 1.0mm thick version.) Also, because it is milky white, you can easily find coins or other small items that fall to the bottom. Since it is handmade, there may be slight imperfections, but it is finished to a practical standard. Also, there may be linear scratches that appear to be from the PP material creation process, please understand. The size is based on my own bag (Longchamp Le Pliage S size, model number 1621, bottom size approximately 22 x 14 cm). Just in case... the bag is not included in the product. Thank you for your understanding. Instant purchase OK * For an additional 100 yen, you can change to anonymous shipping (Yu-Packet Post). Please let me know in the comments before purchasing.