There is ABSOLUTELY NO REASON not to use the "wrong" side, there are no quilt police. However, on a personal note, I bought fabric for a border for a family reunion quilt; when I went to sew it on, I noticed that the back of the fabric better fit the colors in the quilt, so I used it. After all you buy both sides of the fabric, that means you can use both sides, or either side. LOL I'd have bought the $5 fabric, as that was too good a deal to pass up, plus you can use it, either way. Beautiful horse by the way.