Ring Size Guide

Finding your perfect ring size is simple with a few easy methods. Use the tips below to ensure a comfortable and secure fit.


General Tips


Your fingers can swell slightly throughout the day — measure in the evening for the most accurate size.

- Avoid measuring when your hands are cold, as fingers shrink slightly.

- A ring should fit snugly but slide over the knuckle with slight resistance.


Method 1: Measure a Ring You Own

  1. Choose a ring that fits the intended finger and measure its inner diameter (in mm) using a ruler.

  2. Match the measurement with the chart below.


Method 2: Use String or Paper

  1. Cut a thin strip of paper or string.

  2. Wrap it around the base of your finger — not too tight or too loose.

  3. Mark where the ends meet and measure the length (in mm).

  4. Match the circumference with the chart below.


Ring Size Conversion Chart


 US/Canada  Diameter (mm)  Circumference (mm)
 5  15.7   49.3
 6  16.5  51.9
 7  17.3  54.4
 8  18.1  57.0
 9  19.0  59.5
 10  19.8  62.1

Need Help?


If you’re unsure or between sizes, feel free to contact us at hello@echoandcostudio.com — we’ll be happy to assist you.