⚠ Important: For 100% Ring Size Accuracy, visit your local jeweler for an in-person measurement. All tools on this site are estimates only.
Complete Sizing Guide

How to Measure Your Ring Size

Everything you need to know about finding your exact ring size — from home methods to professional tools.

SizeRings.com › How to Measure Your Ring Size

Finding your correct ring size is one of the most important steps before buying any ring. Whether you're shopping online, buying a gift, or ordering a bespoke piece, getting the size right avoids costly resizing and disappointment. This guide covers every approach.

The Quickest At-Home Method

The paper strip method is the fastest and most reliable home measurement technique:

  1. 1
    Get a thin strip of paper

    Cut a strip roughly 10mm wide. A receipt works perfectly.

  2. 2
    Wrap around your finger base

    Wrap snugly around the base of the intended finger. Check it passes over the knuckle.

  3. 3
    Mark and measure

    Mark where it overlaps and measure in mm. This is your circumference.

  4. 4
    Convert to ring size

    Use our ring size chart to find your US, UK, or EU size.

Professional In-Store Sizing

Any jeweller will size your finger for free using a ring mandrel or a set of ring sizing gauges. This is the gold standard for accuracy and takes less than two minutes. We always recommend this for:

  • Engagement rings and wedding bands
  • Rings over a certain price point
  • Rings that cannot be resized (e.g. full eternity bands, some gemstone settings)
  • Buying a ring as a surprise gift for someone

How to Find Someone Else's Ring Size

Buying a ring as a gift without the recipient knowing? Here are the best tactics:

  • Borrow one of their rings — take a ring they wear on the intended finger and have a jeweller measure it, or measure the inside diameter yourself.
  • The string trick — while they sleep, carefully wrap a piece of string around their finger. Mark it and measure.
  • Ask a close friend or family member — someone who shops for jewellery with them may already know.
  • Use the average — if all else fails, size 6 (US) is the most common women's ring size; size 10 (US) for men. Both can be resized.

Factors That Affect Ring Size

Ring size isn't fixed. These factors can change your measurement by half a size or more:

🕐

Time of Day

Fingers are smallest in the morning and largest at the end of the day. Measure in the evening for the most representative size.

🌡️

Temperature

Cold weather shrinks fingers; heat expands them. Measure at a comfortable room temperature.

🧂

Salt & Diet

Salty foods cause water retention and finger swelling. Avoid measuring after a salty meal.

🤰

Pregnancy

Finger size changes significantly during and after pregnancy. Wait until after birth to size for permanent rings.

Ring Size Quick Reference

USUKEUDiameter (mm)Circumference (mm)
5J4915.749.3
6L51.516.551.9
7N5417.354.4
8P5718.257.2
9R5918.959.3
10T6219.862.2

View the complete size chart →

Remember: If you're between sizes, always choose the larger. A loose ring is far easier and cheaper to fix than one that's too tight.

🧮 Size Calculator

Enter your finger measurement in mm for an instant size conversion.

Open Calculator

Detailed Methods

Explore More

Related Pages

Home
Ring Size Guide
Charts
Ring Size Chart
Tool
Ring Size Calculator
Guide
How to Measure at Home
Guide
How to Measure for Ring Size
Guide
Ring Sizes How to Measure
Men's
Men's Ring Size Guide
Women's
Women's Ring Size Guide
Rings
Engagement Ring Size Guide
Rings
Wedding Ring Size Guide
UK
UK Ring Size Chart
US
US Ring Size Chart
EU
EU Ring Size Chart
Japan
Japanese Ring Size Chart
AUS
Australian Ring Size Chart
Reference
Ring Dimensions Guide
Stats
Average Ring Size
Reference
Ring Sizes Explained
Convert
Ring Size Conversion
Tool
Printable Ring Sizer