Discovering your ring size can be as simple as heading to your local jeweler and having your finger measured, but there are also a few easy ways to assess your ring size at home. We recommend measuring the inside diameter of a ring you already own.
Measuring the inner diameter of the ring you already own
If you have a ring that already fits your finger well, you can use a ruler to measure the inside diameter of this ring: Take your ruler and measure straight across the inside of the ring from edge to edge. Take the diameter measurement in millimeters, and then use our measurement-conversion chart to find your ring size.