Our wallpaper is sold per panel to ensure the design pattern can be aligned since all our designs are straight match prints. Our wallpaper doesn’t require an overlap; therefore, you don’t need to calculate extra material for overlaps. First, measure the following dimensions of each wall: width and length. Width: Measure the width of your wall in inches and divide it by the width of the roll (19 inches). For example, 7 peel and stick panels for a 124-inch-wide wall (124/19 = 6.52) - Remember to round up a number! Length: Find the wallpaper length (96 or 108 inches). For example, size 19 x 108 for a 107-inch-tall wall, etc.