Ring Sizer App: Size & Measure
Ring Sizing Measurement Tool
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Find your perfect ring size in seconds. Measure your finger or match any ring with instant results. Save & share — no guesswork, no wrong sizes, no jeweler visit needed.
Find your perfect ring size — accurately, instantly, and from anywhere.
Ring Sizer is the easiest way to measure your ring size at home. Whether you're shopping for an engagement ring, wedding band, or a gift for someone special, get the exact size you need in just a few taps. No jeweler visit required.
TWO WAYS TO MEASURE
Measure Your Finger
Place your finger on the screen and adjust the slider until it fits perfectly. The app guides you step by step for a precise reading every time.
Match Any Ring
Already have a ring? Place it on the screen and drag the circle to match the inner edge. Instantly see the exact size — perfect for surprise proposals or reordering a favorite piece.
INSTANT RESULTS IN EVERY STANDARD
Get your ring size displayed simultaneously in all major international sizing systems:
- US & Canada
- UK & Australia
- European (EU)
- Japanese (JP)
- Millimeters, inches, and circumference
No more confusing conversion charts. One measurement gives you every size you need, no matter where you shop.
SAVE & ORGANIZE YOUR SIZES
Keep all your measurements in one place. Save ring sizes with custom labels like "Engagement Ring" or "Wedding Band," and access them anytime. Perfect for couples shopping together, jewelers on the go, or anyone who buys rings regularly.
SIZE CONVERSION
Need to convert between sizing standards? The built-in converter lets you quickly switch between US, EU, UK, JP, and more — ideal when shopping from international jewelers or traveling abroad.
SHARE WITH ANYONE
Found your size? Share it directly with your partner, a jeweler, or paste it into any online checkout. No more texting "what's your ring size?" back and forth.
DESIGNED FOR ACCURACY
Ring Sizer uses your device's actual screen dimensions for precise on-screen measurements. The slider-based interface eliminates guesswork, giving you results you can trust for real purchases.
PERFECT FOR
- Engagement & wedding ring shopping
- Buying rings as gifts or surprises
- Online jewelry shopping from any country
- Jewelers and jewelry professionals
- Couples planning a proposal
- Reordering or resizing existing rings
FREE & PREMIUM
Ring Sizer offers powerful features for every user.
Free — always available:
Instant size conversion between all major international standards (US, UK, EU, JP, and more)
No account required
Premium — unlock the full experience:
Measure your ring size by placing your finger directly on the screen
Match any existing ring using the on-screen circle method
Save unlimited ring sizes with custom labels
Share your sizes with anyone instantly
Three ways to go Premium:
Lifetime — One-time purchase, yours forever. Ideal if you just need your size once.
Weekly — Short-term access when you only need it briefly.
Yearly — Best value for jewelers, couples planning a wedding, or anyone who shops for rings regularly.
All plans include full access to every Premium feature.
Weekly and Yearly are auto-renewing subscriptions. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage or turn off auto-renewal anytime in your Apple Account settings. Lifetime is a one-time purchase and does not renew.
PRIVATE & SECURE
Your measurements stay on your device. No account required, no data collected, no ads tracking your shopping habits. Just a simple, accurate tool that respects your privacy.
Download Ring Sizer today and never guess your ring size again.
Privacy: https://innowavesolution.com/privacy
Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
First impressions matter, so we gave onboarding a makeover. New look, clearer steps, and a setup that gets to know you — so the app feels like yours from the very first screen.
The developer, InnoWave SRL, 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:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- InnoWave SRL
- Size
- 56.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 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
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Lifetime Offer Ring Sizer $39.99
- Ring Sizer Pro Yearly $19.99
- Ring Sizer Pro Weekly $3.99
- Copyright
- © InnoWave SRL