The Large PECS Communication Book is a 260mm x 235mm, 3-ring binder that is great as a first book for new PECS users. This picture-ready PECS Communication Book is made of a thick, poly plastic material that is smooth to the touch, yet extremely durable. The back of the book is longer than the front to accommodate the Sentence Strip™. This allows access to the Sentence Strip no matter which page in the book is in use. The book includes strips of VELCRO® Brand fasteners (hook or loop), two non-tabbed Insert Pages and one Sentence Strip.