Beautiful fabric! I have found that the Kaufman fabrics do not shrink much. I think the Warm & Natural and Quilter's Dream battings are only supposed to shrink about 3%. That is my experience anyway. I have not noticed any problems with mine. I have had occasions where not all of my fabrics were prewashed (mixing in precuts). If you have not already done so, I would not prewash the back unless you are using something that you know will shrink a lot. Also, if you are using cotton batting, you can spritz it with water and throw it in the dryer for a few minutes. That might shrink it a bit before you use it.