Dry Erase Replacement Board Covers are perfect for recovering an existing dry erase board or chalkboard economically. It can also be used to customize any clean, smooth, hard, non-porous surfaces into a dry erase board or learning station around a classroom. 20? x 24? sheets are easy to handle and have full adhesive backing. Sheets cut easily to fit custom size area. Erases cleanly with no shadowing. Six sheets will cover 20 square feet. Recyclable.