This is a freely expandable bookend, like an accordion. To use it, simply pull the sides to adjust to the amount of books you want to store! The width can be adjusted steplessly from approximately 10cm to 48cm, so it will fit the width of the books you want to store perfectly. Inside the bookend, there are two dividers, so the books won't fall over even if there are only a few. You can also sort and store books, notebooks, files, etc., by type. The corners of the bookend have a smooth curved finish, so you don't have to worry about getting hurt if you touch them. The main body is made of metal, so you can attach memo pads to the sides with magnets. [Set Contents] Bookends x 2 [Size (approx.)] Width: 10cm - 48cm, Height: 19cm, Depth: 15cm [Color] Black [Material] Metal Thank you for viewing.