It depends on the quilt. If I am having custom quilting done.. and I want to show off the quilting I go with a premium muslin. Jo'ann's has a very nice premium 110 inch wide that I use a coupon . If I want a print I use Thousands of Bolts or Fabric.com. I have had occasion to be disappointed in the wide backing from Fabric.com.. it was very thin and so loosely woven it was just a few threads better than cheesecloth. So if shopping on Fabric.com fro wide backs .. if no manufacture is listed in the description be very cautious.