Size: 10.5 * 15.4 * 19.4CM/4.1 * 6 * 7.6in, please refer to the size chart for details. We have many similar hot-selling products, please click on the top of my shop name to enter my shop, you will have more product choices. Metal material thickened steel plate, stable storage. Not easy to push. Telescopic design, can be elongated 49CM/19.2in, large capacity, can hold a lot of books, when not in use, it can be retracted to make full use of the space. Wide Applicability: This book stopper is suitable for desks, bookshelves, bedside tables, offices, schools, libraries, and more. It can also store family photo albums, cookbooks, binders, and other items, meeting various storage needs.