Call on loose or mismatched buttons to serve as the charming clasps on handmade napkin rings. You'll need shank buttons, which have holes on the back. We used a variety of mother-of-pearl buttons, each about 1 1/2 inches across. Thread a 12-inch length of cording through each shank, and tie its ends in a knot. Secure knot to shank with a needle and thread so that it will stay hidden behind the button. Wrap cording around a folded napkin, looping it back over the button to secure.