Bookshelf Card Holders - Holds 4 ½" x 5"

4 ½ " x 5" Magnetic
Adheres to the TOP of Metal Shelves

4 ½" x 5" Magnetic
Adheres to FRONT of Metal Shelves

4 ½" x 5" Peel & Stick Remove & Reuse

4 ½" x 5" Peel & Stick Aggressive

4 ½" x 5" Velcro