Ohuhu Wall Sticker Chalkboard Contact Paper Blackboard Sticker Self-adhesive and erasable chalkboard - Can be quickly and easily applied to any clean, flat surface. Just work like a real chalkboard! [Cleaning cloth is included.] Customizeable - With an area of 79" x 18" [200 x 45 cm], you can cut them to your desired size which can be used separately or combined for a large chalkboard writing surface. Easy on & easy off: Each 79" X 18" chalk board wall sticker is made of black Polyvinyl Chloride (PVC). Removal is fast, easy and residue-free. Just peel it off the surface when you're finished. Long-lasting and with no air bubbles or shifting. Perfect for writing thoughts/brainstorming, leaving messages and creating art no matter where you are in the building.