I usually use 108 or 120 inch. Recently I read about using up some of your stash that you want gone. Let's face it, sometime a piece of fabric stays aroud forever. The cautions about using your stash for this is 1 be careful of the color that you put one the back. If you have white and put black on the back it may show through. Also, use the least amount of seams as possible. Lots of seams equals harder time quilting.