Ring Size Guide

Find your perfect fit.

Convert between sizing systems, or measure your finger at home — Australian, US, UK and European sizes, all in one place.

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If you're between two sizes, we recommend sizing up. For bands wider than 3mm (most signet rings, statement pieces), consider going up half a size for comfort.
Method 1

Measure with string or paper

  1. Wrap a thin strip of paper or string snugly around the base of your finger, where the ring will sit.
  2. Mark the point where it overlaps.
  3. Lay it flat and measure the length in millimetres with a ruler — that's your circumference.
  4. Enter it below to find your size.
Method 2

Measure a ring you already own

  1. Pick a ring that already fits the intended finger well.
  2. Measure straight across the inside of the band, from edge to edge, in millimetres.
  3. That's your inside diameter. Enter it below.
AU / UK—
US / CA—
EU—
Diameter—
Circumference—
AU / UKUS / CAEUDiameter (mm)Circumference (mm)
Conversions on this page are based on the ISO 8653:2016 international ring sizing standard (European size = inner circumference in millimetres), cross-checked against published jewellery industry size charts. For a made-to-order piece, we always recommend confirming with an in-person or at-home measurement, and sizing up half a size for bands wider than 3mm.