3dRose LLC db_112992_1 Drawing Book, 8 by 8-Inch, Cool Outer Space Stars and Planets Dark Blue Design-Science Fiction Sci-Fi Geek Astronomy Nerd 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