Notebook/Planner Cover and Double-Sided Accessory Pouch SMALL fits 10"H x 8"W x 1"D notebooks MEDIUM fits 11"H x 8½"W x 1"D notebooks LARGE fits 11¾"H x 10¼"W x 1½"D notebooks . These sturdy, padded covers fit notebooks and planners in three sizes. Each cover features a handy outer zippered pocket as well as a slip pocket inside the back. A flap closure fastens with a hidden magnetic snap and an attached bookmark helps you find your place quickly. A see-through, double-sided accessory pouch holds pens, pencils, highlighters and markers, washi tape, post-its, and more. The pouch is sized to fit inside either of the pockets or into the inner sleeve.