A roll of double-sided foam tape is great for mounting pictures decorations mirrors posting notes calendars homework keys and much more. Use four inches for each 1/2 pound of weight to be mounted. Use only for mounting objects up to two pounds. Cut to desired length. Apply on any surface but not recommended on wallpaper walls painted with flat paint or on delicate surfaces. The tape width is approximately 0.5" and the roll length is eight feet. Instructions provided on back of package.