Does NOT fit all books. Please MEASURE your PAGES. Why throw away your address book when all you need are some fresh pages? These pages are heavy enough to write addresses on but are NOT a heavy paperboard. Our paper is from a responsible source, has a recycled content, is acid free, durable enough to write addresses on, without being excessive. Made in the U.S.A. by ACCE, Freshen up and expand your favorite address book without starting all over again. Recap; 5 3/4 by 7 inches, PLEASE MEASURE your PAGES and see the photos for hole positions, Not a heavy paperboard, 24 Sheets each sheet is printed on both sides ( equals 48 pages ), U.S.A made by ACCE Reduce, Reuse, Recycle.