3dRose db_50581_1 Misty Moon and Stars-Astronomy Drawing Book, 8 by 8-Inch 8 x 8 Inch spiral bound hard covered 9/16 inch Twin Loop Wire Binding Spines 50 pages, 8 x 7.75 Inch - page thickness is 80lb text Acid free bright white paper, non-coated paper Pages lay flat when book is opened