first of all I love all your "flutterbys" I would love to quilt around the outline of each part of the butterfly and then down the sashing. The 1/4" around the outsides would be recommended if you are wanting to just highlight the outer edge of the butterfly. Check on batting recommendations. This quilt lends itself to several different possibilities. Making the butterflies shine is the object I would go around in the ditch of each part then echo again at 1/4"