If I'm not sure where my quilt is going, I usually make them 72" x 96" which is ok for the couch, generous on a single, perfect for a double and a little skimpy for a queen but would work. If I'm sure that it's just a lap quilt or for QOV, I make it 60" X 80". I never make square quilts (they just seem to be an odd size) although my good quilting buddy loves them.