Ring Size-What’s My Ring Size?

127 reviews
Content rating
Everyone
50K+
Downloads
Content rating
Everyone
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Our free Ring Size App is accurate and easy to use.

Find out a ring size in UK, EU or USA measurements.

All sizes F - Z included, from smallest to largest finger.

Simply place your loved one's existing ring on your phone screen, and then adjust the circle until it fits the inside of the ring exactly.

This app helps you keep an engagement ring or a special gift a surprise and saves you a trip to the jewellers.

The Diamond Store – Luxury With Confidence
Find out a ring size in UK, EU or USA measurements. All sizes F - Z included.
Updated on
Apr 15, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, Messages, and Device or other IDs
  • Data is encrypted in transit
  • You can request that data be deleted

Ratings and reviews

123 reviews
Chris Gorman
December 15, 2024
The ring sizing is not accurate. Clearly have not coded the app to adjust for different screen sizes. Says I'm a W when I used it on a size Q ring... That's 6 ring sizes out, 12 if you include the half sizes! Do not use it!
1 person found this review helpful
Did you find this helpful?
Bianca Kirby
July 10, 2024
Trying to identify a ring of unknown size. Seemed unbelievable. Sense checked the app against 3 rings that I know the size of and miles off. App showing around 3 full sizes bigger than accurate.
Did you find this helpful?
A Google user
February 13, 2019
I used this app as a handy way to size up my wife's ring before buying a new one for her birthday. Oh, it was wrong, it showed her old ring as between 'H' and 'I', so thats what i ordered. Needless to say, the new ring was too big! Turns out - after popping to the jewelers - i should have ordered an 'F'. Thats three sizes out. It even shows the new ring as bigger than an 'I'. I'm not happy because now i have to pay to resize it. My advice, go see a professional and don't bother with this.
34 people found this review helpful
Did you find this helpful?

What’s new

Interface update: Streamlined the layout for better focus.
Content rating
Everyone
Learn more

App support

Phone number
+443450841200
About the developer
REGALIAN LIMITED
urgent@thediamondstore.co.uk
Odeliah House 1 New Brent Street LONDON NW4 2DF United Kingdom
+44 20 8457 3363