I have a baby quilt top, Around the World Pattern. It measures 45x45 inches. I have 2yds of flannel that I want to use for backing. After washing and drying, it is now 42 inches wide, before savalges are removed and 69 inches long. What would be the best way to put the backing together or would you just use a different backing. I want it to look nice as I am giving it as a shower gift. Thank you so much.