Measure the height and perimeter of your room and calculate the overall size of the wallpaper you need
According to the different patterns of the wallpaper, you will waste some of the length of the wallpaper to match the patterns of the 2 wallpapers. So "2" is the smallest buffer
Superior Design Modern Print Embossed Wall Covering Sticker Film For Living Room Bedroom Indoor and TV Background Wallpaper 50X1000Cm