Slide one of these handy Black Side-Loading Dry Erase Pockets over a document magazine or book and write or highlight without damaging your surface. Great for the classroom and handy for home-use too just write on and wipe away again and again using these dry erase sleeves. Opens from top and side for easy use. Plastic. 10" x 13" “I'm always looking for ways to reuse products. I love the dry erase sleeves because they are so versatile. You could add worksheets and use them in centers or small groups or even teach highlighting information in stories.”