Quad Rule graph paper, also known as 4x4 graph paper has four squares per inch, so each square measures .25" x .25" It is frequently used for math or science for younger children (teens and college age may use 5x5). Graph paper has many uses. Here are some possible ones: Design projects, mapping for board/video/roleplay games, designing floorplans, tiling or yard landscaping, playing pen and pencil games, planning embroidery, cross stitch or knitting. Some occupational therapists use squared paper for writing practice. Artists may use grids to copy pictures. Programmers, engineers and scientists may prefer graph paper for notes that involve formulas. Alternate names: Quadrille Paper, Coordinate paper, grid paper, squared paper or math paper