RingMeter: Ring Size Finder

Now with 14 country size standards, ring inventory for tracking your collection, band width compensation, and a printable PDF paper sizer. 100% offline.

For online jewelry shoppers who need to know their exact ring size before buying. For partners planning to propose who want to measure secretly without asking. For people sorting through inherited or estate jewelry who need to know which ring fits whom. For wide wedding band buyers who need a more accurate fit than standard sizers can give.

RingMeter is the ring sizer that just works.

→ Place any ring flat on the screen and align the on-screen circle to its inner edge to read the exact size → Get instant readings in 14 country standards — US, UK, EU, Japan, China, Australia, India, Canada, Mexico, Italy, Spain, Germany, Russia, Hong Kong, and Brazil — at the same time → Wide band? Enter the band width in millimeters and the app applies comfort-fit compensation automatically, so wedding bands and signet rings fit right → Measure your finger directly with the on-screen ruler when no reference ring is available → Save sizes for everyone — partner, parents, siblings, friends — and never guess again when buying gifts → Track every ring you own in a private inventory: diameter, finger fit, optional reference photo, and personal notes. Perfect for organizing estate jewelry, coordinating surprise gifts, or running a small jewelry business → Export a printable PDF paper sizer with reference circles and a measuring strip, for situations where the phone screen can't be used or to mail an exact size to a jeweler → Calibrate accuracy with a credit card or coin using the international ISO/IEC 7810 standard

→ No system permissions required. No camera, no microphone, no location, no contacts. → No account. No login. No data ever leaves your iPhone. → No advertisements. No third-party SDKs. No analytics.

→ Long press a profile to edit, swipe to delete, tap + to add a new family member or ring → Switch between diameter and circumference display modes anytime → Choose your default sizing standard so the size you care about always shows first → Re-calibrate the screen anytime if you switch devices or display zoom settings

Built for iOS 17. 100% offline. No data collection. No ads. 3-day free trial included.

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