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.