This 11 disc cornell style note taking loose leaf paper size of 8.5" x 11", Letter Size 50 sheets/100 pages for 100 days, improve your productivity with this daily organizer. Cornell notes papers for compatible with A4 Staples Arc, Office Depot TUL, Talia, Levenger, Happy Planner, and other 11 discs letter size discbound notebooks. Refill paper 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. This refill line paper for school notes, meeting notes, or any form of writing, our Ruled Sheets have subtle gray lines spaced by a quarter inch.