A Guide to Ring Sizing

Ring Size Chart

Diameter (mm) Circumference (mm) UK / AU / NZ US / CA
15.3  48.0 I 4 1/2
15.5 48.7 J 4 3/4
15.9 49.9 K 5 1/4
16.3 51.2 L 5 3/4
16.7 52.5 M 6 1/4
17.1 53.8 N 6 3/4
17.5 55.0 O 7 1/4
17.9 56.3 P 7 3/4
18.3 57.6 Q 8 1/4

 

Method 1: The Paper/String Test

  1. Wrap: Cut a thin strip of paper or a piece of non-stretchy string. Wrap it snugly around the base of the finger you intend to wear the ring on.

  2. Mark: Use a pen to mark the exact point where the end meets the rest of the strip.

  3. Measure: Lay the paper/string flat against a ruler and measure the distance in millimeters (mm). This is your inner circumference.

  4. Check the Chart: Match that measurement to the Circumference column in our size chart below.

Tip: Don’t pull the string too tight. It needs to be able to slide over your knuckle.

 

Method 2: Measure an Existing Ring

  1. Select a Ring: Find a ring that fits the correct finger on the correct hand (your dominant hand is usually slightly larger).

  2. Measure Diameter: Use a ruler to measure the inside diameter of the ring in millimeters. Do not include the thickness of the metal band.

  3. Check the Chart: Match your millimeter measurement to our Inner Diameter column.

 


 

Tips for Accuracy

  • The Afternoon Rule: Fingers change size throughout the day. For the most accurate result, measure your finger at the end of the day when it is at its largest.

  • Temperature Matters: Cold weather can shrink your fingers by up to half a size. Ensure your hands are at room temperature before measuring.

  • Consider Band Width: If you are purchasing a wide band (6mm or wider), we recommend choosing one half-size larger than your normal size for a comfortable fit.

  • The Knuckle Factor: If your knuckle is significantly larger than the base of your finger, measure both and choose a size in between the two.

Uncover Collection - Form I: Origin

The Aperture Cuff

Shop now

The Orbital Ring

Shop now