"Constellation" black opal and diamond ring, crafted in 18 karat white gold.

Now that you have found the perfect ring, let’s make sure we select the perfect size. Either for yourself or a loved one, we believe this moment is special and we aim to make this process seamless and accurate, so let’s find your size!
We have created the chart below to show the accurate diameter of each ring size on all screens. There are two ways to measure your ring size. Place a pre-owned ring on the closest matching sized circle on the chart below. Another way is to use a ruler to measure the inner diameter of your pre-owned ring. If a ring falls between two sizes, order the larger size. Now you know your ring size, how exciting!