Ring Sizing

Get Your Ring Size Right with Our Ring Sizer

Choosing the right ring size is key to enjoying your carbon fiber ring comfortably and confidently. That’s why we offer an easy-to-use Ring Sizer to help you get the perfect fit the first time around. If the fit isn’t right, no worries—we offer free size exchanges!

Our ring sizer is a 4mm standard width and usually matches up to about 8mm. We recommend adjusting your size based on the width of the ring you plan to purchase. For example, if our sizer gives you a size 9.5 and you’re buying an 10mm or 12mm ring, we suggest going up to a size 10 for the best fit.

Precision Sizing Tips

All of our rings are available in half-size increments to ensure a more tailored fit. While quarter sizes aren’t typically needed, finger size does fluctuate throughout the day due to weather and activity. Follow these tips for the best sizing experience:

A Perfect Fit Should:

  • Slide smoothly over your knuckle with minimal resistance
  • Rest comfortably when your finger is bent
  • Allow easy movement and rotation without applying too much pressure

Additional Sizing Tips:

  • Finger sizes vary throughout the day—fingers tend to be slimmer in cooler weather and more swollen during warmer temperatures. The best time to size is in the mid-afternoon.
  • Measure multiple times for accuracy before making your purchase.
  • Wider rings (10mm or more) tend to fit more snugly, so consider going up by half a size if you’re choosing a wider band.

Find Your Size Using a Printable Chart

Already have a ring and just need to confirm the size? Download our Printable Sizing Chart and follow the instructions to find your exact size. Simply print the chart, place your existing ring over the circles to match the size, and you're good to go!


Find Your Size at a Local Jewelry Shop

For added precision, visit a local jewelry shop to get professionally sized. Ensure that the ring width you try matches the width of the carbon fiber ring you're planning to purchase. Remember, a 2mm sizer won’t give the same fit as an 8mm ring!

US Ring Standard Size

 Inside Diameter (inches) Inside Diameter (mm) Comparable Item Fit Guide

4.0

0.586

14.9

 

4.5

 0.602 15.3
5.0 0.618 15.7
5.5 0.634 16.1
6.0 0.650 16.5
6.5 0.666 16.9
7.0 0.682 17.3
7.5 0.698 17.7
8.0 0.714 18.1 U.S. Dime ($0.10) = 17.9mm
8.5 0.730 18.5
9.0 0.746 18.9 U.S. Penny ($0.01) = 19.05mm
9.5 0.762 19.4

10.0

 0.778 19.8

10.5

 0.794 20.2

11.0

 0.810 20.6

11.5

 0.826 21.0

12.0

 0.842 21.4 U.S. Nickel ($0.05) = 21.2mm

12.5

 0.858 21.8

13.0

 0.874 22.2

13.5

 0.890 22.6

14.0

 0.906 23.0

14.5

 0.922 23.4

15.0

 0.938 23.8

15.5

 0.954 24.2

16.0

 0.970 24.6 U.S. Quarter ($0.25) = 24.26mm