The Invisible Book Shelf is ideal for home and office. It holds up to 15 pounds of books. Directly screws the screws into the wall stud and presto - the stainless steel sheet is 5.5" x 5" x 1.6" in size. It is easy to install and includes two screws and two wall studs. It comes packaged in a 7" 5.75" x 2" hanging box.