Measure Ring Size Online
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
How to Measure Your UK Ring Size
Simple methods to find your perfect UK ring size at home
Finding your correct UK ring size is essential for comfort and security. Below are several reliable methods you can use at home to determine your ring size.
UK Ring Sizes: The UK uses a letter system (A-Z) for ring sizes, unlike the numerical systems used in the US and other countries.
Method 1: String or Paper Strip
What You'll Need:
- A piece of string, strip of paper, or floss
- Pen or marker
- Ruler (mm)
- Scissors
Steps:
- Cut a strip of paper about 10cm long and 0.6cm wide, or use a piece of string or floss of similar length.
- Wrap it around the base of the finger you want to measure. Make sure it's not too tight or too loose.
- Mark the point where the paper or string overlaps to form a complete circle.
- Measure the length from the end to your mark in millimeters. This is your finger's circumference.
- Use our UK Ring Size Converter to find your ring size based on this circumference.
Tip: Measure your finger 3-4 times to ensure accuracy, especially at different times of the day as your finger size can change.

Method 2: Using an Existing Ring
What You'll Need:
- A ring that fits the intended finger well
- Ruler (mm) or caliper
- Our printable UK ring size chart (optional)
Steps:
- Find a ring that fits well on the finger you want to measure.
- Measure the inside diameter of the ring in millimeters. Place the ring on a ruler and measure the distance from one inner edge to the opposite inner edge.
- Alternatively, download our Printable UK Ring Size Chart and match your ring against the circles until you find a perfect fit.
- Use our UK Ring Size Converter to find your ring size based on this diameter.
Tip: Make sure the ring you're using as a reference fits comfortably—not too tight and not too loose.

Method 3: Using Our UK Size Finder Tool
Understanding UK Ring Sizes
The UK ring size system uses letters ranging from A to Z+. Each letter corresponds to a specific inner circumference and diameter measurement. UK ring sizes are also used in Australia, Ireland, and several other Commonwealth countries.
Common UK ring sizes:
- Women: Typically range from J to O, with M being average.
- Men: Typically range from P to T, with R being average.
UK ring sizes differ from US sizes (which use numbers) and European sizes (which use circumference measurements in millimeters). Use our converter to translate between these systems.
Tips for Accurate Measurement
- Measure when your fingers are at normal temperature - Cold fingers are smaller, while hot fingers are larger.
- Measure at the end of the day - Fingers tend to be largest in the evening.
- Consider the width of the band - Wider bands feel tighter than narrow bands of the same size. You might need to go up a size for wider rings.
- Account for knuckle size - If your knuckle is significantly larger than the base of your finger, measure both and choose a size in between.
- When in doubt, go larger - It's easier to size a ring down than to size it up.
Frequently Asked Questions
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.
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.