Size guide

Find your ring size

Use the finder below if you already know your size in any country, or if you have a measurement in millimetres. Every system converts to the same physical ring.

Your size —

Two ways to measure at home

Method 1 · String or paper Measure your finger
  1. Cut a strip of paper about 5 mm wide, or use a piece of string.
  2. Wrap it around the base of your finger — snug, but able to slide over the knuckle.
  3. Mark where it overlaps, lay it flat and measure the length in millimetres.
  4. That length is your circumference. Enter it in the finder above.
Method 2 · Existing ring Measure a ring that fits
  1. Choose a ring worn on the same finger of the same hand.
  2. Place it on a ruler and measure straight across the inside, edge to edge.
  3. Read the millimetres to one decimal place.
  4. That length is your diameter. Enter it in the finder above.

International conversion chart

Tap any row to select it Tap a row to select · swipe sideways for more systems
Diameter Circumf. US / CA UK / AU EU / ISO France DE / RU JP / CN India

Country not listed? Most others follow one of these systems: Ireland, New Zealand and South Africa use the UK letters; Italy, Spain, Switzerland and the Netherlands use the EU / ISO circumference; Germany and Russia quote the inside diameter in millimetres. Give us any of those numbers and we can match it.

Getting the fit right

Measure at the end of the dayFingers are at their largest when warm. Cold hands read up to half a size small.
Mind the knuckleThe ring must pass the knuckle with a little resistance, then sit snug at the base.
Wide bands run tightFor a band over 6 mm wide, go up a half size. Halo rings sit high — keep your true size.
Between two sizes?Choose the larger one. Your first resize within 12 months is complimentary.