One roll measures 20.5"x18' and covers about 30.75 square feet.
Promising review: "This wallpaper is not sticky, it is tacky. That’s what allows it to be removed without damaging the wall. I was able to reposition it once or twice on a freshly painted eggshell finish wall. I think people who are having issues with it falling down are either putting it on flat paint or a dirty wall.Make sure to wash off your wall before trying to put this up otherwise it will just stick to the dust then fall off. I found the pattern easy to line up, it repeats perfectly. The background of the print almost makes it look like it is made from linen." —C. Schaffer
Get it from Amazon for $27.75 (available in blue and green).