Smart poly Material has been designed for charts in the classroom and home. These charts are strong, durable, water resistant, and do not need lamination. Display with hooks, Ashley Smart Tak, pins, tacks, staples, etc. The surface is designed for dry erase and water based markers and washable crayons. Great for reusable learning. Use with Clothespins, magnets, etc. To keep track of progress, feelings and behaviour (Clothespins/magnets not included). clip chart measures 9" x 24" with a dry-erase, glossy surface, . 45mm, and grommet hole for easy hanging.