2-sided with a larger writing surface 8in. x 10in. paddles have an EZ clean surface - just wash with soap and water. Includes markers with an eraser that stores in the handle and points that don't push in. Replacement sheets restore battered surfaces - just peel and stick over old surface. Sheets are sold separately. Certified AP Nontoxic. Greener choice - contains 10% postconsumer recycled content. KleenSlate (R) Deluxe Dry-Erase Response Paddles, Handwriting, Pack Of 32 is one of many Manipulatives available through Office Depot. Made by KLEENSLATE CONCEPTS.