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.
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.
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.
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.
Use our free online tool. No download needed.
Step 1: Calibrate Your Screen
Place a standard credit card on your screen for pixel density calibration.
Place your ring on the screen and drag the handles to match its inner edge.
Your Ring Size
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US Size
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UK Size
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EU Size
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Japan Size
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Diameter (mm)
Tip: Calibrate your screen with a credit card first for maximum accuracy. Want size history, family profiles, and advanced features? Download the app.
A standard credit card is 85.6mm wide. Drag the handles to match your card's width exactly.
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
Music:
Film and Television:
Theater and Dance:
Video Games:
Fashion:
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Influence on Global Culture:
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The relationship between Japan's entertainment industry and its culture is a unique study of how ancient traditions can seamlessly merge with cutting-edge global exports. In 2024, Japan's media market reached an estimated $114.3 billion, with anime alone hitting a record $25 billion. This economic powerhouse is built on a foundation of "soft power," where Japanese values like social harmony and wabi-sabi (beauty in imperfection) are packaged into globally consumed media. The Synthesis of Tradition and Modernity
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Japanese entertainment is famously difficult to export because of uchi-soto. Uchi (inside) media is for Japanese eyes only—inside jokes, local geography, specific TV station gags. Soto (outside) media is for export. Studio Ghibli films are soto; a variety show where a comedian tries to eat 100 pickled plums in 3 minutes is uchi.
The modern idol’s work ethic is a secular version of Bushido (the way of the warrior). They are expected to endure suffering silently. A dating ban is common for female idols, not because of law, but because the "pure" girlfriend image is the product. When a member of the group AKB48 announced she was getting married, she apologized to fans for "betraying their trust." In the West, a pop star gets married and People magazine celebrates; in Japan, she bows in shame.
Unlike the fragmented streaming landscape of the West, Japanese television remains a monolithic force. The major networks—Nippon TV, TV Asahi, TBS, Fuji TV, and NHK (the public broadcaster)—operate under a system known as key station dominance. They produce a mix of content that feels alien to outsiders but is comfort food for locals. J-Pop (Japanese Pop) and J-Rock (Japanese Rock) are
No discussion is complete without the juggernaut. Anime is no longer a subculture; it is mainstream culture. The global success of Demon Slayer: Mugen Train (the highest-grossing film of 2020 worldwide) proved that anime is a dominant force.
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.