Definitions for "Double roll"
bolt of wallpaper, generally containing 50 to 56 square feet or about 32 linear feet.
A bolt of two single rolls of wallpaper, packaged in a continuous length. This allows more useable yield from the wallpaper itself.
A continuous roll of wallpaper equivalent to two single rolls. Priced as two single rolls, double rolls are packaged this way to give you more usable wallpaper with less waste during installation.