20.5 in. x 33 ft. = 56 sq.ft Prepasted - Washable - Strippable Guaranteed to instantly make walls pop, cover an entire room with ease with removable Marvel Ultimate Spiderman Blue Wallpaper by York Wallcoverings. Created using SureStrip technology, install this removable wallpaper with ease on any smooth, flat surface of your choice. To hang, measure the wall and cut strips accordingly. Then activate the backing with water and apply - thats it! Use a smoothing tool to smooth out any bubbles or wrinkles. To remove, simply peel. Watch each panel effortlessly come off of the wall while keeping walls 100% safe and clean. Its the easiest wallpaper youll ever hang - thats the York Wallcovering guarantee!