This is an insert only for the Longchamp Le Pliage L size bag. It 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 decided to offer 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 stock availability.) The corners are rounded to prevent scratches on the bag. It is sufficient and useful unless you put something extremely heavy that would cause the bag to lose its shape. (It's not a wooden or plastic board, so it will flex to some extent. Please understand.) 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 within a practical range. 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 L size, model number 1899, bottom size approximately 30 x 19 cm). Instant purchase OK Shipping included [Additional Information] I can also make it with a thicker 1.0mm material. It will be less likely to bend or flex. It is 1111 yen. Please comment if you would like this option. [Additional Information 2] 1.0mm thickness is now available as a standard product.