Sizing

Ring Size Guide

The right fit makes all the difference. Use our chart and simple at-home methods to find your size with confidence, so your ring feels as good as it looks.

Ring size chart

Prism & Pearl rings are made in US sizes. Australia and the UK use letters, so we have included those too.

US size AU / UK size Inside diameter Inside circumference
5J½15.7 mm49.3 mm
6L½16.5 mm51.9 mm
7N½17.3 mm54.4 mm
8P½18.1 mm57.0 mm
9R½19.0 mm59.5 mm
10T½19.8 mm62.1 mm

Not every design comes in every size. Check the size options on each ring before you order.

Find my size

Already measured? Enter your number and we will match it to a size.

Your size will appear here.

How to measure your ring size

Choose whichever method suits you. Measuring a ring you already love is the most reliable way to do it at home.

Method one

Measure a ring you own

  1. Choose a ring that fits the finger you plan to wear your new ring on.
  2. Lay it flat on a ruler and measure straight across the inside, from edge to edge. Do not include the metal.
  3. Enter the number above, choosing "Across a ring", or match it to the inside diameter in the chart.

Method two

Measure your finger

  1. Wrap a thin strip of paper or a piece of non-stretchy string around the base of your finger.
  2. Make sure it is snug but still slides over your knuckle. Mark where the end overlaps.
  3. Lay it flat and measure to the mark in millimetres. That is your circumference.
  4. Enter the number above, choosing "Around my finger", or match it in the chart.

Method three

Visit a jeweller

  1. Any jeweller can size your finger in a minute, usually at no charge.
  2. Australian jewellers will give you a letter size. Use the chart above to convert it to a US size.

Tips for the perfect fit

Measure later in the day

Fingers are smaller first thing in the morning and when you are cold. Measure in the afternoon at room temperature.

Mind the knuckle

If your knuckle is larger than the base of your finger, choose a size that slides over the knuckle comfortably.

Between sizes? Size up

A slightly roomier ring is more comfortable, especially for wide bands, eternity bands and stacks.

Measure the right finger

Your dominant hand is usually a little larger, so measure the exact finger and hand you will wear the ring on.

Measure two or three times

Repeat your measurement on different days and use the one that comes up most often.

Buying as a surprise?

Borrow a ring they already wear on that finger and use method one. If you need a starting point, US 6 and 7 are common sizes for women.

Still unsure?

Send us a message and we will help you find the right size.

Contact us

Need a size 10?

Our rings are made in US sizes 5 to 9 as standard. Size 10 is made to order, so please allow extra time for delivery. We will confirm timing by email once your order is placed.