I planned to use them in a doll quilt. Was going to cut the fabric 1 1/2", but the pattern in the daisies would have just disappeared, so I cut 2". I would say you would not want to go any smaller than that, as you have to stop at the halfway point & fiddle with the next inner diamond.
Was going to use these for the mug rug swap, but they are 12 inches now, and are not bound yet.