Ring Sizing Guide

How to Measure Your Ring Size

There are two easy ways to find your size:

Option 1: Use a Ring You Already Own

  1. Choose a ring that fits the finger you’re buying for.
  2. Measure the inner diameter in millimeters using a ruler or caliper.
  3. Match your measurement to the chart below.

Option 2: Measure Your Finger Directly

  1. Wrap a thin strip of paper or string around your finger where the ring will sit.
  2. Mark where the ends meet and measure the length in millimeters.
  3. Use the circumference to find your size in the chart below.

Tip: Measure at the end of the day, when your fingers are warm, for the most accurate fit.

International Ring Size Conversion Chart

US Size Diameter (mm) Circumference (mm) UK Size EU Size Japan Size
4 14.8 46.5 H 47 7
5 15.7 49.3 49 9
6 16.5 51.9 52 12
7 17.3 54.4 54 14
8 18.1 57.0 57 16
9 19.0 59.5 59 18
10 19.8 62.1 62 20
11 20.6 64.6 64 23
12 21.4 67.2 67 25
13 22.2 69.7 70 27

Do you need a different size, or are you unsure what works best? Many of our rings can be resized—just contact us, and we’ll be happy to help.