One-of-a-kind Mexican fire opals · Worldwide shipping
Goldenopals

Ring size guide

We use standard US ring sizes, from 3 to 13, including half sizes. If you already know your size in another country's system, use the conversion table below as a starting point.

US sizeInner diameter (mm)Inner circumference (mm)
314.144.2
414.946.8
515.749.3
616.551.9
717.354.4
818.157.0
918.959.5
1019.862.1
1120.664.6
1221.467.2
1322.269.7

How to measure at home

Wrap a strip of paper or string around the base of your finger, mark where it overlaps, and measure the length in millimeters. Compare that measurement to a printable ring sizer or a local jeweler's sizing tool for the most accurate result — paper strips can stretch slightly.

Resizing

Most rings can be resized by our artisans. If your selected size differs from the ring's current size, resizing adds 1–2 business days before shipment — this is additional time before your order ships, not the total delivery estimate.

Not sure about your size, or ordering for someone else? Contact us before you check out and we'll help.