The free downloadable Ring Sizer app is both accurate and simple to use—you can’t go wrong.It’s as simple as this. You can find out what ring size you need in measurements for the UK, EU, or the USA. All sizes can then be determined accurately and easily.Place the person’s existing ring on your smart phone screen that has had the Ring Sizer app downloaded. Now, adjust the circle until it’s an exact fit of the inside of the ring. This handy Ring Sizer allows you to keep your ring gift a secret—whether it’s the engagement ring or any other special ring as a gift. You keep the surprise a secret—without making an unnecessary trip to the jeweler.Maybe you’re not sure how to download the free Ring Sizer app. No problem. All you have to do is fill in the simple form with your details below, and register for our e-newsletter too. Then we’ll send you a link to download the Ring Sizer app.

What’s New

Version 1.05

Bug fixing and latest device compatibility.

Ratings and Reviews

5.0 out of 5
9 Ratings

9 Ratings

AvivMendel ,

Great app!!

Finally I found easy app to measure my wife’a ring without her knowledge...


Is Spencer ,

Best App

Perfect app to determine your ring size

sapirg ,



App Privacy

The developer, Guy Mendel, 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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