Peel-and-stick pockets are quick and easy to apply! Simply remove the backing and adhere to the inside cover of a book or magazine. Standard 3-1/2 x 4-1/2" manila pockets can be used to store Catalog Cards or Book Charging Cards. Also great for attaching to a bulletin board or poster to hold and display letters of the alphabet, numbers, chores and much more! 500 pockets, each measuring 3-1/2 x 4-1/2", per box.