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. For use with chalk and felt erasers. Hardboard backing will not warp. Measures 9. 5" 12". Sold as a pack of 6 boards. Plain single sided chalk board for home or office. Works well for handwriting practice, working equations, brainstorming, and more. For use with white and color chalk and felt erasers. Measures 9. 5" 0. 125". Pack of 6 boards.