Isometric Graph Paper,3D Triangular Grid Paper Notebook The Isometric paper is printed with a grid of equilateral triangles. It is priceless for any kind of three-dimensional design including architecture, landscaping or sculpture. Some artists use it to draw puzzles or labyrinthine 3D images with boxes and staircases. It has become particularly popular for planning complex 3D Printer projects, and it may also be used for geometry. Perfectly sized at 8.5"x11" 110 Pages Not perforated Softcover bookbinding Flexible Paperback 3D Optical Illusion Cover