Self-adhesive Wallpaper with gridlines helps you to install the wall paper easily. This product can be applied to any smooth, clean and dry surface. Easy to apply! This wall paper can be applied to any smooth, clean and dry Surface. There are gridlines on the back for easy measurement and cutting. It’s easy to remove or re-use and they don't leave sticky messes behind. It is easy to remove or re-use and they don't leave sticky messes behind.