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 paper time and money by eliminating copying worksheets over and over again. Reusable super heavyweight pocket lasts a long time. Convenient eyelet for hanging. Easily clean with a soft dry cloth or tissue when used with a low-odor dry erase marker or dry erase crayon (not included). Insert Size: 9 x 12 or smaller sized papers. Each pack includes 25 pockets 5 each of primary colors: red orange yellow green and blue.