Ring Sizer: Size Measure
Finger Gauge, Chart & Convert
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Lay a ring on the screen. Size the disc to its hole. Read your size free in your own system, or all nine with Pro. Real millimeters for your exact screen.
Most ring sizer apps use a generic circle on every phone. Screens vary in size, so the number it gives you is a guess. That's why reviews often say, "it said 10, it was 7." This app computes real millimeters from your exact device screen. Lay a ring you already own flat on the glass, size the glowing disc to its inner hole, and read your size.
KEY FEATURES
- Real millimeters, not screen points: the disc is sized to your device's actual screen, so what you see is the actual size.
- Verify accuracy: place a bank card against the screen to confirm the scale in about ten seconds.
- Your own size system on every result, free. All nine at once with Pro: US and Canada, UK and Australia, EU and ISO, Japan and Korea, China, India, Germany and the Netherlands, Italy and Spain, Russia.
- Accurate results: each reading includes a tolerance band, and the app flags unlikely numbers instead of guessing.
- Save one person's sizes free, or every person and finger with Pro, with a measurement log and median reading.
- Eight concise guides, all free, cover wide bands, large knuckles, resizing, and daily size fluctuations.
WHO IT IS FOR
Whether you're buying a ring online, ordering from another country's sizing system, sorting inherited jewelry, deciding whether to resize a band, or discreetly sizing a partner's finger before a proposal, this app gives you a verifiable number.
WORKS WITH
Wedding bands, engagement rings, signet rings, stacking rings, wide bands, vintage and inherited rings.
FREE AND PRO
Measuring a ring is free, unlimited, and always will be, and every result shows your own size system plus ISO. The bank-card accuracy check, the tolerance band, all eight guides, and one saved profile are free too. No ads and no account: all your measurements stay on your device.
Pro unlocks all nine systems on every result, the no-ring finger method, fit advice for wide bands and large knuckles, the full conversion chart, a printable paper sizer, an on-screen millimeter ruler, a shareable size card, saved sizes for everyone and every finger, and the discreet partner sizing kit.
IN-APP PURCHASE
Ring Sizer Pro is a one-time purchase, not a subscription. You pay once, nothing renews, and there is nothing to cancel.
- Payment is charged to your Apple ID at confirmation of purchase.
- The purchase stays on your Apple ID and can be restored on any device from Settings inside the app.
- Measuring a ring is free and stays free. Pro is never required to get a size.
Terms of Use (EULA): https://abouchfa.com/terms
Privacy Policy: https://abouchfa.com/privacy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Abdeljalil Bouchfar, 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
- Location
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Abdeljalil Bouchfar
- Size
- 63.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 9 more
- English, Arabic, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Ring Sizer Pro Lifetime $2.99
- Copyright
- © 2026 Abdeljalil Bouchfar