If you already have a ring that fits well on your finger, you can measure the inside diameter of the ring to determine your ring size. Using a ruler, measure across the inside of the ring from one edge to the opposite edge. Note the measured diameter in millimeters and then use our conversion chart to determine your corresponding ring size.

The easiest way to determine your correct ring size is to measure your finger with a strip of paper. First, cut a strip of paper approximately 3/4 inch wide and 4 inches long. Wrap the paper tightly around the base of your desired finger and mark the point where the paper overlaps. This length is your finger's circumference. Then use our conversion chart to find the ring size that corresponds to your measurements. If the circumference of your finger below the knuckle differs significantly from that of the knuckle itself, measure the knuckle as well and choose a ring size that falls between these two measurements.