18kt Black Gold Mariani Phantom Collar Necklace Containing Approximately 2.75 Carats Of Multi-Shaped Diamonds. The Necklace Also Contains A Diamond Clasp And Measures 4 1/4 Inches In Diameter, It Would Fit Approximately A 15 Inch Neck.
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.