Reusable Dry Erase Pockets help to improve students' skills. Anyone can easily practice math problems, letters, writing skills and more. Helps to save the environment and paper by eliminating the need to copy worksheets over and over again. Reusable super heavyweight pocket lasts a long time. Clean easily with soft dry cloth or tissue when used with a low-odor dry erase marker or dry erase crayon (not included). Convenient eyelet for hanging. Each pack includes 5 pockets, 1 each of red, orange, yellow, green and blue. Insert Size: 9 x 12, or smaller sized papers.