Use a Ring Size Chart to Determine Your Ring Size
Determine your ring size by using a ring that already fits you or the person you will be giving the ring to.
Place this ring over the nearest size circle below. The inner edge of the ring should align to the outer edge
of the circle.
You can also measure the inside diameter of your ring and chose an appropriate corresponding ring size.
In both cases, if the ring seems to fit between two sizes, then opt for the larger size.