This large graph paper size of 24" x 36", 4"x4" blue quad rule, it is easily meet your daily drafting usage and replacement. Graph pad with 25 sheets/50 pages for 50 days, is great for draftsmen, architects, designers, civil engineers, structural engineers, mathematician and for students as well as other professionals.Grid paper pad is used to high quality 100gsm pure white premium acid-free paper, so you can confidently use most pens, pencils, and markers without ghosting and bleed-through. sheets are perforated for easy and neat sheet removal, And sturdy strong 1200 GSM backer to protect desktops.Triangle bound corners protect graph paper.Use for engineering or technical drawings, drafting, drawing blueprints, crafting, or creative drawings. Standard 4 x 4 graph-ruled paper is a staple for elementary math, geometry, calculus, trigonometry, physics, and the arts.This graph desk pad are made up of great quality paper. Give it to your friends, family as a gift.