3dRose db_38834_2 Pink Sweet 16 Birthday-Memory Book, 12 by 12-Inch 11.5 X 11.5 Inches spiral bound hard covered 1 inch twin loop wire binding spine 35 pages, 11.4 X 11.2 Inches - page thickness is 63lb cover Acid free blank bright white non-coated paper Pages lay flat when book is opened