Pro Art Graphing Paper is a high quality, 20lb bond paper with non reproducing blue grid. 3D Graph Paper 8.5"x 11"20lb Acid Free 50pc- Isometric pattern forms a 60 degree grid of small triangles which are arranged in groups of 6 to make hexagons. Ideal for 3 dimensional drawing, writing, and triangle point embroidery patterns. Acid-free, neutral pH.