SizeMyRing: Ring Sizer

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