You didn't mention the length . . . is the length ok, or is there extra? If extra, I saw a neat technique on Fons & Porter that worked well for me. If extra, you cut the backing on the diagonal from top corner, to the bottom opposite corner. I know this sounds drastic, but try it on a piece of paper to see how it works. When you have 2 very long triangle pieces, you slide one piece down, until you get the width need. Then, mark, sew on diagonal at the altered width and of course length. If you don't have enough extra fabric on the length, this won't work. Hope you are able to correct somehow. Good luck, Patty