Made of durable and long-lasting plastic. Easy to clean and store, great for games, review and testing in all subjects and for all grades. Great for active learning. Each paddle has dry erase blank side and on the other side lined. Marker stores in handle. Writing surface of each paddle is 7" x 7" and 12" long. Available in a 2 Pack in random colors or a 12 Pack Classroom Set with 3 of each of 4 colors (Blue, Red, Yellow, and Green). Replacement round dry erase sheets just peel and stick over the old surface and come in 8/package. Dry erase markers come in 4 per pack.