Clean very well the surface you intend to apply the sticker on. This product is easy to apply and will not leave stains on walls when removed Apply on painted surfaces at least 3 weeks after painting. If applied on wallpaper the sticker will NOT be REMOVABLE Can be applied on laminated surfaces but might cause damage when removed The package contains 2 sheet of 60 x 30 cm containing 60 stickers each With this product you can achieve a finishing size of 100 x 100 cm, depending on your preferences