Save paper by using a time tested and reusable writing surface. Black chalk boards are the perfect size to store in students' desks or notebooks. Works well for handwriting practice, working equations, brainstorming, and more. Rounded corners and smooth edges for safety and comfort. For use with white and color chalk and felt erasers. Comes with adhesive squares for mounting. Hardboard backing is warp and chip resistant. Measures 9.5" x 12" x 0.125" For best results prime the chalkboard surface by rubbing the entire surface with the side of a chalk stick, then erase completely. Bundle of 12 Chalk Boards.