Ring Sizer

  1. 1Cut a thin strip of paper (or use a piece of string).
  2. 2Wrap it snugly around the base of your finger — not too tight.
  3. 3Mark where the strip overlaps to complete a full circle.
  4. 4Lay flat and measure the marked length in millimetres.
mm
Your size Enter measurement above

Measure at the end of the day when fingers are slightly larger. If your knuckle is wider, size to the knuckle.

  1. 1Pick a ring that fits the intended finger well.
  2. 2Place it on a flat surface or trace the inner edge on paper.
  3. 3Measure the inner diameter — straight across the centre.
  4. 4Enter the measurement in millimetres below.
mm
Your size Enter measurement above
⌀ — mm
mm
⌀ mm Circ. mm US / CA UK / AU EU / FR Japan

Between sizes? Choose the larger size for wide bands. When in doubt, go one size up — rings are easier to size down than up.