Hygloss Products Library Card Pockets, Non-Adhesive, 3.5 x 4.875 in, 30 Pockets, Purple LIBRARY POCKETS FOR CLASSROOM: Teachers use library pockets for keeping track of borrowed books in their classroom library and for classroom organization. PERFECT FOR ARTS AND CRAFTS: Small colored envelopes are perfect for card making and decorating as gift tags for all occasions. OFFICE ORGANIZATION: Library pockets help keep track of small items such as keys and business cards in the office. These library pockets are non-adhesive. 30 HIGH QUALITY LIBRARY BOOK POCKETS: Made with acid free, fade resistant, and durable stock paper. Proudly made in the USA. BRIGHT COLORS ARE FUN FOR KIDS: Library envelopes are fun for creating games, classroom job charts, and learning activities.