I love the way these shade work, however, measuring could cause problems.  The size quoted is a bit off.  I had a 72" window, so I selected two 36" blinds.  However, because of the casing, they both would not fit in the window frame. I had to go back and order a 34" blind - so one 36" and one 34" blind covered the window and fit the window frame.  I was able to use the extra 36" blind in another room.  That said, these are fantastic blinds.  Pictures just don't do them justice!  and boy are they easy to install - either to the wall or to the ceiling whichever way works best.  Great buy and I love them!!!