Beware of the calculator. I used the "roll calculator" on the website and based on the wall sizes I entered, I was told I would need 6 rolls. That was completely wrong - just under 3 rolls were used. Customer Service was quick to let me know I could return the unused rolls but the quote for return postage almost matched the $100 of extra paper. A lot of money wasted because of the innacuracies of the "calculator." The representative agreed that the measurements I provided (which are 100% accurate) should call for 6 rolls according to the calculator but all she could offer was "sorry for any inconvenience this may have caused..." and now I'm out $100. The 3 rolls that were used all had many minor defects that had to be worked around. Shame on me for not buying from a US company...