Refill your disc-bound planner or 3-ring binder with this book log replacement paper. You can select from three paper options: standard 20# paper (75 GSM), 24# paper (90 GSM), or heavyweight 80# card stock (225 GSM). By combining multiple sets of various page styles, you can create your ideal planner and enhance organization and productivity. These refills are offered in two paper sizes: 5.5" x 8.5" or 8.5" x 11". Layout may vary slightly between page sizes.