18kt Yellow Gold Roberto Coin Diamond Solitaire Necklace Containing A Single Round Brilliant Cut Diamond Weighing .19 Carats Bezel Set. The Diamond Is On A An 18in Chain That Is Adjustable to 16in.
Take a piece of non-stretchable string, ribbon, thread, or a thin strip of paper. Wrap it comfortably around your ring finger, close to the knuckle.