Hygloss Library Cards, Assorted Colors, 3-Inch x 5-Inch, (500 Pack)These sturdy Hygloss Library Cards are ideal for the classroom or lending library. They fit perfectly in Hygloss Bright or Manila Library Pockets, as well as any standard size library pockets. Double sided, with space to write the Title, Author, Date Due and Borrower's Name, these library cards are the way to go for tracking all your books and media.