3dRose db_173072_2 Balloons with Purple Banner Happy 90Th 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