TLS Extra Book Pockets for Book Pocket / Book Card Combo Pack - 100pk Book pockets feature unique fold-over construction with reinforced top and side edges to prevent wear and extend the life of the pocket Deep, low back book pockets measure 4-1/2" H x 3-1/2" W and hold a standard-width 3 x 5" book card Pockets are self-adhesive and reinforced to resist tears even on heavily circulated items Made from highest grade, #77 pale cream, acid-free, high-fiber content paper to insure tear resistance and durability 100 Pockets per package