Ring size guide
Ring Size by Diameter
Measure the inner diameter of a ring that already fits, then use the calculator to find the closest standard ring size.
Measure the inner edge
Place the ring on a ruler and measure the widest inner opening, not the outside edge of the band.
Check more than once
A small angle change can move the reading by a fraction of a millimeter, which can affect the closest size.
This tool provides an estimated ring size only. Double-check before buying, especially for expensive, custom, or engagement rings.
FAQ
Common questions
How accurate is this ring size tool?
It provides an estimated ring size. Screen calibration, browser zoom, ring alignment, and measuring method can all affect the result.
Can I measure ring size on my phone?
Yes. A phone is often easier because you can place a ring directly on the screen after calibration.
What if I am between two sizes?
Check the fit with another method. Wider bands can feel tighter, so many buyers choose the larger nearby size for wide rings.
Should I use this for an engagement ring?
Use it as a starting point only. For expensive, custom, or engagement rings, confirm with a professional jeweler.