Mila's Ring Sizer & Converter
Jewelry & Wedding Band Fit
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
From Mila's Tools — Apple Staff Pick, 4.8 from 1,200+ reviews. Measure your ring size on screen or convert across US, EU, UK, Japan, China, Hong Kong & Swiss systems.
From the developer of Mila's Tools (Apple Staff Pick, 1,200+ reviews at 4.8).
Find your perfect ring size in seconds. Seven international sizing systems on one screen — no charts to memorize, no guesswork.
Mila's Ring Sizer & Converter is the standalone version of the ring sizing tool from Mila's Tools, the 29-category unit converter on the App Store since 2011. Type any size and every other standard updates in real time:
* Inner Diameter (mm)
* Inner Circumference (mm)
* US Ring Sizes
* EU (Continental) Ring Sizes
* UK Ring Sizes (A–Z, with half sizes)
* Swiss Ring Sizes
* Japanese Ring Sizes
* Chinese (Mainland) Ring Sizes
* Hong Kong Ring Sizes
Don't know your size? Measure directly from your phone:
* Match a Ring on Screen — lay a ring on the display and tap the circle that fits. US sizes 3 through 15 in half-size steps.
* Measure with String — wrap a strip of paper around your finger, then read the length on a calibrated on-screen ruler accurate to 0.5 mm.
A one-time screen calibration with a common coin ensures physical accuracy. 13 reference coins from major currencies are included — the app picks the right one for your region.
Whether you're shopping for an engagement ring, ordering a wedding band online, sizing a surprise gift, or comparing international jewelry — type one value and every other standard appears instantly, or measure first and let the app do the rest.
Sizes are displayed in each system's standard increments — half sizes for US, whole numbers for EU and Asian systems — so you always see the nearest real size, not a raw decimal.
Features:
* Measure your ring size directly on your phone
* Real-time conversion as you type
* Favorite units for quick access
* Show or hide units you don't need
* Clean, ad-light interface
* Available in 13 languages
* Works fully offline — your data never leaves your device
From the developer of Mila's Tools — Apple Staff Pick, 4.8 from 1,200+ reviews on the App Store. Download Mila's Ring Sizer & Converter and find your size in seconds.
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Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Convert British letter ring sizes (A through Z, with half sizes) alongside US, EU, Swiss, and other standards
The developer, Scott DeSapio, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Scott DeSapio
- Size
- 11.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
English and 12 more
- English, Danish, French, German, Hindi, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Ring Size PRO Yearly $2.99
- Ring Size PRO Monthly $0.99
- Ring Size PRO Lifetime $3.99
- Copyright
- © 2010-2026 Scott DeSapio