Estone Large Blackboard Removable PVC Wall Sticker Kids Chalkboard Art Decal 45x200cm These blackboard sticker are really easy to apply on walls, refrigerators or kitchen cabinets Some wall paints are designed to resist stickers, please check before purchasing It's recommended to clean the wall leaving no dust and dirt before applying the stickers onto your wall We strongly suggest having 2 persons to apply the stickers Please don't use it on freshly painted walls,Place on a smooth flat surface such as walls or windows etc