Graph Paper Notebook In addition to being great for science and math, the graph notebooks are great for organizing, drawing and creating. The possibilities are endless. Notebook/Journal General Info Line/Square Spacing = Narrow Rule (4 squares per inch) = 0.25" or 6.35mm Squares = Light, Thin Grid Squares on Both Sides Pages = 101 Graph/Grid Pages/50 Sheets of White 55 lb Paper (which help minimizes bleed-through) Dimensions = 8.5" x 11" (21.59 cm x 27.94 cm) Cover = Matte Soft Cover Binding = Professional Paperback Binding Note.. The pages are NOT perforated. Also...Several summary/index pages were included so a Table of Content can be created, if desired. Thanks for checking out this notebook.