SizeMyRing: Ring Sizer
Measure finger size, converter
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Jeweler-grade ring size in under two minutes — measure with a ring, finger, photo or string, then convert to US, UK, EU, JP & Swiss sizes. Private, no account.
Find any ring size in under two minutes — no jeweler, no guesswork.
SizeMyRing turns your iPhone into a precise ring-sizing instrument. Measure four ways, get every international size at once, and save it forever.
MEASURE HOW YOU LIKE
• Ring on screen — lay a ring on the display and match the glowing circle to its inner edge.
• Finger on screen — set two bars to the width of your finger.
• Camera — photograph a ring or hand next to any bank card for scale.
• String or paper — the classic wrap-and-measure, guided step by step.
EVERY STANDARD, INSTANTLY
See US/Canada, UK/Australia, EU (ISO), Japan/China and Swiss sizes together, plus exact inner diameter and circumference in millimetres. A built-in converter and full size chart are included.
PERFECT FOR GIFTS
Gift Mode measures a partner's ring discreetly in about 60 seconds — ideal for engagement rings. Save sizes for the whole family so you're ready for every birthday and anniversary.
ACCURATE & PRIVATE
Calibrate the screen with any standard payment card to make on-screen measurement jeweler-grade. Everything is measured and stored on your device — no account, and photos never leave your iPhone.
SIZEMYRING PREMIUM
Unlock unlimited measurements, every tool, unlimited saved people, PDF chart export and jeweler-ready sharing. Choose a weekly plan with a 3-day free trial, an annual plan, or a one-time lifetime purchase.
Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings.
Terms of Use: https://emeraldapps.io/sizemyring/terms
Privacy Policy: https://emeraldapps.io/sizemyring/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, EmeraldApps.io, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- DJORDJE MANCIC PR USLUGE INFORMACIONE TEHNOLOGIJE EMERALD APPS BEOGRAD (NOVI BEOGRAD)
- Size
- 4.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
English and 7 more
- English, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime $29.99
- Annual $19.99
- Weekly $2.99
- Copyright
- © EmeraldApps 2026