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.
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.
Answer: The engine's cooling system is critical to its performance at slow speeds. Proper cooling is essential to prevent overheating, which can result in reduced engine performance, increased emissions, and engine damage.
This guide provides exclusive insights into the critical concepts, highly tested scenarios, and exact technical answers required to ace your slow-speed engine management examinations. 1. Combustion and Indicator Diagram Analysis
What are the primary risks of prolonged slow-speed operation of a 2-stroke engine, and how are they managed? Answer: The primary risks include cold corrosion in cylinder liners and fouling of the scavenge space and turbochargers. stcw test engine management slow speed answers exclusive
Adjust the Variable Injection Timing (VIT) system if the entire unit shows late or early ignition.
Passing the International Convention on Standards of Training, Certification and Watchkeeping (STCW) Engine Management exam is the final hurdle to securing a senior engineering license. Among the most challenging sections of this assessment is the management, troubleshooting, and optimization of large, two-stroke, slow-speed marine diesel engines. Answer: The engine's cooling system is critical to
For Marine Engineers preparing for their Certificate of Competency (CoC), the oral examination is a crucible. While general engineering knowledge is expected, there is a specific category of questioning that separates the amateurs from the future Chief Engineers:
The STCW convention aims to ensure that seafarers are properly trained and certified to perform their duties safely and efficiently. The Engine Management course is a crucial part of the STCW training program, covering the operation, maintenance, and management of shipboard engines and machinery. Adjust the Variable Injection Timing (VIT) system if
To give you a concrete idea of the depth of knowledge required, here are some "exclusive" style questions and sample answers you might encounter. These go beyond simple recall and test your application and management-level decision-making.
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
Answer: The engine's cooling system is critical to its performance at slow speeds. Proper cooling is essential to prevent overheating, which can result in reduced engine performance, increased emissions, and engine damage.
This guide provides exclusive insights into the critical concepts, highly tested scenarios, and exact technical answers required to ace your slow-speed engine management examinations. 1. Combustion and Indicator Diagram Analysis
What are the primary risks of prolonged slow-speed operation of a 2-stroke engine, and how are they managed? Answer: The primary risks include cold corrosion in cylinder liners and fouling of the scavenge space and turbochargers.
Adjust the Variable Injection Timing (VIT) system if the entire unit shows late or early ignition.
Passing the International Convention on Standards of Training, Certification and Watchkeeping (STCW) Engine Management exam is the final hurdle to securing a senior engineering license. Among the most challenging sections of this assessment is the management, troubleshooting, and optimization of large, two-stroke, slow-speed marine diesel engines.
For Marine Engineers preparing for their Certificate of Competency (CoC), the oral examination is a crucible. While general engineering knowledge is expected, there is a specific category of questioning that separates the amateurs from the future Chief Engineers:
The STCW convention aims to ensure that seafarers are properly trained and certified to perform their duties safely and efficiently. The Engine Management course is a crucial part of the STCW training program, covering the operation, maintenance, and management of shipboard engines and machinery.
To give you a concrete idea of the depth of knowledge required, here are some "exclusive" style questions and sample answers you might encounter. These go beyond simple recall and test your application and management-level decision-making.
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.
