Measure stone and add 4 inches.
Pro Tip: How to splice your wire. Make sure your splice is on the inside, and by that I mean, not facing outward in the edge of cuff where it will catch and unravel. Do not cut the first wire yet, leave it facing up. With your next 2 foot piece of wire, you want to be sure you are going in the same direction. Do not cut either end just yet. Wait until you have wrapped the next circle on the Infinity first. This insures no accidental movement of wire. Then trim and fold over bar getting them to butt up against each other on the bar