Sometimes overbuying does work in ones favor. I started quilting on a quilt today and decided I needed blue instead of white and figured I'd just have to put it away til I went to town - looked in my box and darned if I didn't find a partial spool of thread that worked perfectly! I was a happy camper. I just bought a little gizmo that gives a guide as to how much thread one needed for each size quilt - I liked that idea!