1 - Cut a string or paper strip about 100mm long and 2mm wide.
2 - Wrap around the base of your finger. It has to fit snug, but not too tight.
3 - Mark the point on the string/paper where it overlaps forming a circle.
4 - Compare the length of the string/paper to the chart attached.
*If you are between sizes, order a larger size. Make sure your finger is at a normal body temperature (fingers shrink or expand when cold or hot). If your knuckle is much larger than your finger’s base, take two separate measurements and choose a size in between. You want a ring to fit over your knuckle, but not be too loose or it will shift around.