Ring Size Converter
Convert between international ring sizing systems with precision
Ready to Convert
Select your ring size and target system to see the instant conversion
Measure Ring Size Online
Professional ring sizing from the comfort of your home
Screen Calibration
First, we need to calibrate your screen to ensure accurate measurements
Standard credit card: 85.6mm × 53.98mm
Current Scale: 0.285 mm/pixel
📋 View Instructions
1. Place a real credit card on your screen over the virtual card above
2. Use the + and - buttons to adjust the virtual card size
3. Match the gold lines with the top and bottom edges of your real card
4. Click "Apply Calibration" when they align perfectly
📋 Instructions:
1. Place a real credit card on your screen over the virtual card above
2. Use the + and - buttons to adjust the virtual card size
3. Match the gold lines with the top and bottom edges of your real card
4. Click "Apply Calibration" when they align perfectly
💡 Tips for Best Results
• Use a standard credit card, debit card, or ID card
• Make sure your screen brightness is adequate
• The gold lines should align exactly with your card edges
• Take your time to get the most accurate calibration
Ring Size Tools
Professional tools to help you find the perfect ring size
Frequently Asked Questions
Find answers to common questions about ring sizing
Measurement Questions
There are several methods to measure your ring size: 1) Use a ring sizer at a jewelry store, 2) Measure a ring that fits well using our ring size chart, 3) Use a string or paper strip to measure your finger circumference.
Printable ring size charts can be accurate if printed at 100% scale and used correctly. However, for the most accurate measurement, we recommend visiting a jeweler or using a professional ring sizer.
Conversion Questions
US and UK ring sizes use different measurement scales. For example, a US size 6 is approximately equivalent to a UK size L. US sizes typically range from 3-13, while UK sizes use letters from A-Z.
You can use our ring size converter tool to convert your ring size to millimeters. Simply select your current size system, enter your size, and choose 'diameter' or 'circumference' in millimeters for the conversion.
General Questions
Finger size can change throughout the day due to temperature, activity level, and diet. Fingers tend to be larger in the evening and when warm. It's best to measure your ring size at different times of day.
The ring finger is traditionally the fourth finger of the left hand in many Western cultures. However, some cultures wear wedding rings on the right hand. The choice of which hand to wear a ring on is largely cultural and personal.