Easily measure your ring size at home without a jeweler. Accurately determine your size by measuring your finger or an existing ring, with results instantly displayed in all major international standards.
1.0.3
August 19, 2026
New guided onboarding: see how the app works and learn to measure your ring size accurately — no more guessing.
Unlock unlimited access to ring size measure
Ring Sizer is designed for accuracy by using your device's actual screen dimensions for on-screen measurements. The slider-based interface aims to eliminate guesswork, providing results you can trust for purchases.
No, Ring Sizer is ad-free, allowing for an uninterrupted user experience.
Premium features include measuring your finger directly on the screen, matching existing rings with an on-screen circle, saving unlimited ring sizes with custom labels, and instantly sharing your sizes with others.
Ring Sizer offers Weekly ($4.99/P7D) and Yearly ($29.99/P1Y) auto-renewing subscriptions, with the Yearly plan including a 3-day free trial. A Lifetime option is also available as a one-time purchase.
Yes, Ring Sizer includes a built-in converter that allows you to quickly switch between US, EU, UK, JP, and other international sizing standards, which is ideal for online shopping or travel.
Ring Sizer is available for iPhone and iPod devices.
The latest version, 1.0.1, was released on August 11, 2026, indicating recent development and support for the application.
Ring Sizer has an age rating of 4+, making it suitable for a wide range of users.
