- How to Guide
- Sizing
- Ring Sizing 101

RING SIZING 101
Rings designed for everyday comfort. Start here for simple sizing and styling.
Getting the right fit is easier than it sounds. All you need is an existing ring or a strip of paper and a ruler.
We’ll help you translate your measurement into the size that feels just right.
Measure Your Finger

Step 1
Pick the finger you’ll be adding a ring to.

Step 2
Cut a strip of paper—thin enough to lie flat against your skin.

Step 3
Place it at the base of the finger and wrap it around the spot where you’d like your ring to sit.

Step 4
Pull it snug to make sure you get the best fit.

Step 5
Mark the point where the paper meets.

Step 6
Measure the length using a ruler, in millimeters.

Step 7
Repeat as necessary. It's always best to double (or triple) check.

Step 8
Then, match your measurement to the chart below. If you fall between ring sizes, we suggest measuring up for comfort.
Measure an Existing Ring
Use the size chart to determine your ring size
| Internal Diameter (mm) | US/CAN | UK/AUS | German |
|---|---|---|---|
| 14.1 mm | 3 | F | 14 |
| 14.5 mm | 3.5 | G | 14.5 |
| 14.9 mm | 4 | H 1/2 | 15 |
| 15.3 mm | 4.5 | I 1/2 | 15.25 |
| 15.7 mm | 5 | J 1/2 | 15 3/4 |
| 16.1 mm | 5.5 | K 1/2 | 16 |
| 16.5 mm | 6 | L 1/2 | 16 1/2 |
| 16.9 mm | 6.5 | M 1/2 | 16.75 |
| 17.3mm | 7 | O | 17 1/4 |
| 17.7 mm | 7.5 | P | 17.75 |
| 18.1 mm | 8 | Q | 18 |
| 18.5 mm | 8.5 | R | 18.5 |
| 19 mm | 9 | S | 19 |
| 19.4 mm | 9.5 | T | 19.5 |
| 19.8 mm | 10 | U | 19 3/4 |
| 20.2 mm | 10.5 | V | 20.25 |
| 20.6 mm | 11 | W | 20 1/2 |
| 21.0 mm | 11.5 | X | 21 |
| 21.4 mm | 12 | Y | 21 1/2 |
| 21.8 mm | 12.5 | Z | 22 |
| 22.2 mm | 13 | Z 1 | 22.25 |
WHAT YOU SHOULD KNOW
Finding your ring fit? Rings are designed to feel comfortable from the start, with subtle differences across styles. Here’s what to expect from each fit.
Lightweight and easy to wear. Thin bands sit close to the finger with a barely-there feel. They’re comfortable for everyday wear and ideal for stacking, with a little natural movement when worn together.
Thicker bands take up more space on the finger, which we account for in the design, so they still feel comfortable. Stick with your usual size—but note that stacked rings will fit and feel different than a single thin band.
Flexible by design. Chain bands move with your finger for an easy, relaxed feel. They should sit comfortably without feeling tight, offering a bit more give than a solid band.
FAQ
Measure at the end of the day, when your fingers are naturally a little fuller. Make sure your hands are warm, as cold temperatures can shrink fingers by up to half a size. Alcohol, salt, and hormonal changes can also cause temporary swelling, so try not to measure after cocktails or salty snacks.
Finger sizing varies—even for the same finger on different hands. For the best fit, measure each individually.
We don’t offer half sizes, so we recommend sizing up. A little extra room is always more comfortable.
Recommended Reading
Styling
Base Chain
Our Base Chain is a Mejuri original–made by us, for you. The fully customizable design offers versatility, so you can wear it any way you’d like.


