Wallpaper is priced as single rolls and packaged by the manufacturer and delivered as double rolls. This means that if you order four single rolls of wallpaper, what will actually be delivered to your home or office will be two double rolls of wallpaper - each roll will be equivalent to two single rolls of wallpaper.
When you order wallpaper, you'll select your quantity in even numbers... 2, 4, 6, etc. of SINGLE ROLLS of wallpaper.
When you receive your wallpaper, you'll receive DOUBLE ROLLS, per the manufacturer. For each 2 rolls of wallpaper you order, you'll receive 1 double roll.