Ring size guide
UK to US Ring Size Converter
Select a UK letter size to see the closest US equivalent.
US
7
UK
N
EU
54
JP
14
CN
14
Diameter 17.3 mm · Circumference 54.4 mm · Closest-match reference.
Closest match
Some letter sizes land between US half sizes. Confirm with a second method before buying.
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.