Ring Sizer & Ruler - Mesurix
Measure your finger size in mm
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Find your ring size in under a minute: place a ring on the screen or measure your finger, convert US, UK/AU, EU and JP. Calibrated ruler and bubble level included.
Mesurix finds your ring size right on your screen. No plastic sizers, no printable guesswork charts, no waiting for a kit in the mail — measure a ring or a finger in under a minute and get the size in every major standard.
RING SIZER — TWO WAYS TO MEASURE
• Place a ring: lay any well-fitting ring flat on the screen and scale the circle until it matches the inside edge. The most accurate at-home method.
• Measure a finger: rest your finger on the screen and fit the circle to the widest part of the base, just past the knuckle.
• Fine-tune in 0.1 mm steps — one full ring size is only about 0.8 mm, so precision is everything.
• Between sizes? Mesurix tells you which one to choose, so the ring always passes the knuckle.
EVERY SIZE STANDARD AT ONCE
• Instant conversion chart: US/CA, UK/AU, EU/ISO millimetres and Japan — side by side.
• Pick your preferred standard in settings; switch anytime.
• See the exact inner diameter in mm behind every size.
ON-SCREEN RULER
• A real calibrated ruler in mm, cm and inches, with a draggable guide line.
• Calibrate once for your exact display — re-calibrate anytime for any device.
• Copy the measured value with one tap.
BUBBLE LEVEL
• Surface mode: lay the phone flat and level anything with a live x/y bubble.
• Edge mode: rest the phone on its edge and read the angle in degrees — hang shelves and frames straight.
• Set zero on any known-flat surface to cancel sensor bias.
SAVE, SHARE, PRINT
• Save sizes — yours and the people you choose gifts for.
• Share a size in seconds when you order a ring online or at the jeweler.
• Print a paper ring sizer to double-check before a lifetime moment — engagement, wedding, anniversary.
PRIVATE BY DESIGN
Mesurix works entirely on your device. No account, no sign-up — your measurements stay with you.
Whether you are choosing an engagement ring, ordering jewelry online, sizing a gift without spoiling the surprise, hanging a shelf straight, or just need a quick ruler in your pocket — Mesurix gives you the right measurement the first time.
By using this app, you agree to the Apple Standard End User License Agreement (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Welcome to Mesurix! Measure your ring size by placing a ring on the screen or fitting your finger to the circle, convert instantly across US, UK/AU, EU and JP standards, use the calibrated on-screen ruler in mm, cm and inches, level anything with the bubble level, and print a paper sizer to double-check.
The developer, VAST FLOW, TOO, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- VAST FLOW, TOO
- Size
- 47.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime Access USD 17.99
- Mesurix Pro Lifetime USD 34.99
- Yearly | Mesurix Pro USD 49.99
- Weekly | Mesurix Pro USD 11.99
- Copyright
- © 2026 VAST FLOW