9 Disc discbound refills paper has 9 discbound holes suitable for ring binder, discbound notebook or planner inserts. Loose leaf paper compatible with Happy Planner. 7 X 9.2.5 inches loose leaf paper pack comes with 100 total sheets, double-sided lined pages(200 usable pages) to last you a long time and more environmentally friendly. White paper with the line spacing of 0.27 inches/7mm, there is enough room for easy writing, presenting a clear and neat writing effect. Filler paper is made of 100gsm premium white paper for smooth writing, and heavy-weight, acid-free paper to avoid ink bleed through. Suitable for fountain pen, gel pen, roller pen, ballpoint pen, highlighter, pencil, neutrals and etc. All pens write smoothly on the lined paper refill. Discbound refill lind pages is suitable for bullet journaling, creative writing, work records, meeting record, class notes, travel diary, poem writing, doodles, project notebook, calculus, engineering classes, and more! Premium quality ensure no matter how you use it, it will look great.