Reusable Dry Erase Pockets help to improve students' skills and helps to save the environment and paper by eliminating the need to copy worksheets over and over again. The reusable super heavyweight pocket lasts a long time and is easily cleaned with a soft dry cloth or tissue when used with a low-odor dry erase marker (not included). This Primary Assortment includes 10 pockets (2 each primary colors: red, orange, yellow, green and blue) with a maximum insert size of 9" x 12".