Ring Size Guide

BY: Editors |Oct 8, 2018

How do you order a ring without trying it on? If it's too small, it won't fit over your knuckle, and if it's too big it won't stay on your finger when you start to slow clap after a dog wins a basketball tournament. Avoid such travesties with our ring size guide.

woman wearing several rings

Find your ring size using one of the following methods: the string and ruler method (no printer required) or the diagram method (printer required).

String and Ruler Method 

Supplies Needed

  • Ruler with millimeter measurements
  • Nonstretchy string or a strip of paper


  1. Wrap a piece of nonstretchy string or a strip of paper around the base of your finger.
  2. Mark the point where it overlaps using a pen or fine-point marker.
  3. Measure the length in millimeters using a ruler.
  4. Compare the length to the ring size chart to determine your ring size.
Ring Size Chart
   Size      Length  
Size 5 49 mm
Size 6 51.5 mm
Size 7 54 mm
Size 8 56.5 mm
Size 9 59.1 mm
Size 10 61.6 mm
Size 11 64.1 mm
Size 12 66.6 mm
Size 13 69.1 mm

Measuring Tips

  • All measurements match the inside circumference of the ring.
  • If your finger measurement falls between sizes, order the larger size.
  • Fingers, like brains, are smaller in the morning and bigger by the end of the day. Measure your fingers at the end of the day.
  • Take multiple measurements to ensure an accurate reading.
  • Weather and temperature affect finger size. Do these measurements where it's moderately warm.
  • If you have large knuckles, measure both the base of your finger and your knuckle, and select a size between the two.
  • Fingers tend to be one half-size larger on your dominant hand.

Diagram Method 

Supplies Needed

  • Printer
  • Ring that fits


  1. Download our Ring Size Finder and open it. If it does not open, you may need to download Adobe Acrobat Reader (free).
  2. Print it—be sure to adjust your printer settings to match the settings listed on the Ring Size Finder.
  3. Match your ring to the outlines on the page to determine your ring size.

ring placed on top of diagram

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