Classroom Organizer Chair Covers. Slip these classroom organizers over students' chairs for instant storage. These convenient chair cover organizers are a great way to store scissors pencils craft items and other essentials in a play room or classroom. Add these handy storage ideas to your list of school supplies and stay organized all year long. Covers stretch to size with elastic bands on each side and include one 13" x 11 1/2" and three 4 3/8" x 6" pockets. Nylon. (6 pcs per unit) 14" x 12"