I pressed pieces that I am using my as my backing and the batting got in the way. Hmmmm don't think that I am going to try that again. The way that I am doing my quilt (it is my first) is doing the 9 square and then putting the batting and back on then sew the 3 together and then go on to the next square. Don't know how it will turn out. My squares came out to be 13 1/2 inches a piece.