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

What’s New

Version 2.7

- bugfixes

Ratings and Reviews

1.6 out of 5
7 Ratings

7 Ratings

freddy82 ,

Compared with different phones

Compared with different phones and the results are inconsistent - iPhone 11 Pro tells me it’s size H, whereby an iPhone 7 indicates it’s size K. Having used various other methods to measure the ring, I know it’s neither H, nor K.

FuseIt ,

Ring sizes are completely differen

Depending on phone, there is a huge difference. iPhone XS Max gives size N, iPhone XR gives size V

DJ Lil Jo ,

iPhone 11Pro

Compared to measurements it’s completely out! Ring is most likely k1/2 and app says m! (UK)

App Privacy

The developer,, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary based on, for example, the features you use or your age. Learn More


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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