To measure your ring size at home, wrap a strip of paper or string around the base of your finger, mark where it overlaps, and measure that length in millimeters against a ring-size chart. For the best fit, measure at the end of the day, when fingers are at their largest.
The paper-or-string method is the simplest. Wrap a thin strip snugly around the base of the finger you intend to wear the ring on, mark where the end meets the strip, then lay it flat and measure the length in millimeters. That length is your finger's circumference, which maps directly to a standard US ring size on any sizing chart.
If you already own a ring that fits the same finger, you can measure it instead. Place it on a ruler and measure the inside diameter straight across in millimeters, then match that diameter to a chart. Measuring an existing ring is often more reliable than wrapping the finger, because it removes the guesswork of a snug-but-not-tight fit.
A few habits improve accuracy. Measure at the end of the day, when fingers are at their largest, and avoid measuring when you are cold, since fingers shrink. Choose a slightly larger size for a wide band, which sits more snugly than a thin one, and remember that knuckles larger than the base of the finger may require sizing up so the ring slides on.
When a ring must be exact — an heirloom or an engagement piece — a jeweler's professional sizing is worth the visit. For everything else, a careful home measurement gets you reliably close, and our full sizing guide includes a printable chart with conversions for US, UK, and European sizes.
If you are buying as a gift and cannot measure discreetly, borrow a ring the recipient already wears, or choose an adjustable style. Many of our pieces can also be resized after purchase — ask, and we will help you get the fit right.