Free iPhone ring sizer app: measure a ring on screen, measure finger width, convert US, UK, EU, JP and letter sizes, and save sizes in seconds.
5.84k+ downloads · 4.8 stars
Updated iPhone interface
The updated app keeps ring measurement, finger measurement, conversion, and saved sizes cleanly connected.
Measure a ring, measure a finger, convert standards, and save sizes without visiting a jeweler.
Ring Measurement
Place a ring on the circle and adjust the guide until the inner edge matches.
Saved Sizes
Keep important ring sizes ready for yourself, family, partners, and gift planning. titanic 4k ultra hd blu-ray
Global Size Standards
Convert between US, UK, EU, Japan, Australia, India, and millimeter measurements.
Finger Width Mode
No ring? Measure your finger directly across the on-screen bar and fine-tune the millimeter value. The 4K disc introduces a newly upgraded track
Offline & Private
Works fully offline. Your data never leaves your device. Zero tracking.
Instant Results
Your size appears immediately in all major standards — US, UK, EU, and more. : The inclusion of Dolby Vision and HDR10
Engagement Ready
Planning a surprise proposal? Secretly measure a ring while they're away.
Size History
Track how your ring size changes over time with measurement history.
Clean iPhone UI
Large controls, clear rulers, and focused sheets make each sizing task easy to follow.
The 4K disc introduces a newly upgraded track that transforms the listening experience.
The 4K transfer is a technical marvel derived from a real 4K scan of the original camera negatives.
The release of James Cameron's Titanic 4K Ultra HD Blu-ray Go to product viewer dialog for this item.
: The inclusion of Dolby Vision and HDR10 provides brilliant whites and inky blacks, ensuring perfect contrast even during the dark, late-night sinking sequences.
: Dialogue remains crystal clear while the subwoofer delivers powerful impact during the iceberg collision and engine room sequences.
on December 5, 2023, marked a definitive moment for physical media collectors. This 25th-anniversary restoration brings the 11-time Academy Award winner into the modern era with a stunning visual and auditory overhaul. Unmatched Visual Clarity
: Subtle sounds like creaking lifeboats and rushing water in the corridors are meticulously placed, drawing listeners deeper into the tragedy. Titanic 4K Blu-ray Review - AVForums
: Skin tones are more vibrant, and the wider color gamut enriches everything from the ship's opulent interiors to Rose’s iconic purple hat. Immersive Audio with Dolby Atmos
: Every wood grain, facial texture, and costume thread is rendered with razor-sharp clarity, offering a significant upgrade over the 2012 Blu-ray.
No jeweler visit. No guesswork. Just your phone.
Choose a Mode
Measure an existing ring on the circle, or switch to finger width mode when no ring is available.
Align the Guide
Use the ruler, slider, and plus/minus controls to match the ring or finger width precisely.
Save or Convert
See the measurement instantly, save it for later, or convert it between international standards.
Buy jewelry anywhere in the world with confidence.
US
& Canada
UK
& Australia
EU
Europe
JP
Japan
IN
India
mm
Diameter
Ring Sizer works entirely offline. Your measurements never leave your device. We don't collect, share, or sell any of your data. Ever.
"Used this app to measure ring size. It's accurate and it's really helpful."
Pradep12 · App Store Review
The 4K disc introduces a newly upgraded track that transforms the listening experience.
The 4K transfer is a technical marvel derived from a real 4K scan of the original camera negatives.
The release of James Cameron's Titanic 4K Ultra HD Blu-ray Go to product viewer dialog for this item.
: The inclusion of Dolby Vision and HDR10 provides brilliant whites and inky blacks, ensuring perfect contrast even during the dark, late-night sinking sequences.
: Dialogue remains crystal clear while the subwoofer delivers powerful impact during the iceberg collision and engine room sequences.
on December 5, 2023, marked a definitive moment for physical media collectors. This 25th-anniversary restoration brings the 11-time Academy Award winner into the modern era with a stunning visual and auditory overhaul. Unmatched Visual Clarity
: Subtle sounds like creaking lifeboats and rushing water in the corridors are meticulously placed, drawing listeners deeper into the tragedy. Titanic 4K Blu-ray Review - AVForums
: Skin tones are more vibrant, and the wider color gamut enriches everything from the ship's opulent interiors to Rose’s iconic purple hat. Immersive Audio with Dolby Atmos
: Every wood grain, facial texture, and costume thread is rendered with razor-sharp clarity, offering a significant upgrade over the 2012 Blu-ray.
Guides, tools, and charts to help you find the perfect fit.
Ring Size Chart
Complete conversion chart for US, UK, EU, Japan, and Australian ring sizes with diameter in mm.
How to Measure Ring Size at Home
5 free methods to find your ring size without visiting a jeweler — app, string, paper strip, and more.
Ring Size Calculator
Enter your ring diameter or circumference to instantly find your size in every international standard.
UK Ring Sizes (A–Z)
British letter-based sizing guide with full chart, Hatton Garden tips, and UK to US conversion.
Men's Ring Size Guide
Average men's ring sizes, measurement tips, and a complete chart for wedding bands and signet rings.
Secret Engagement Ring Sizing
How to find your partner's ring size without them knowing — clever tips for surprise proposals.
Free to download. Works on iPhone. No tools needed.
