Isometric Dot Book is designed on a standard sheet of 8.5" X 11" paper with 120 pages (0,28-inch distance between parallel lines). It's important that you have the best tools to help you draw up your perspective whether you are a starter or a professional. The isometric paper for many different purposes, provides an easier method of drawing it out, a great help in laying out projects and enabling preplanning in a snap. Great for creative types, complex and technical design work. Isometric paper is printed with a grid of equilateral triangles (each measuring .28"). It is invaluable for any kind of three dimensional design including architecture, landscaping or sculpture. Some artists enjoy using it to draw puzzles or complex or labyrinthine 3D images with boxes and staircases (rather like the style of MC Escher). It has become particularly popular for planning 3D Printer projects. Some schools and many colleges now offer 3D printing facilities and classes. It may also be used for geometry.