Size13.5 x 16 cm, the frame of book holder swivels to create a wider or narrower base, Increases desktop space by using less area. Easy to usevariable slope adjustment by raising the bar in the support sleeve compact and sturdy,It can hold the textbook,cookbook,ipad and more. Portable Multi-function Book Holder This Bookstand can be folded up flat for easy storage when not in use.Fold it up and take it with you wherever you go!Also great for displaying photos, plates, diplomas, and craft projects. Promotes Correct Reading Posture This Book Holder help you to maintain proper posture when reading over long periods of time,leading to less neck,back and eye strain. Compact and Sturdy This Stainless Steel Book Holder is lightweight but sturdy,meaning its capable of holding large Hardcover textbooks.