Measure at the End of the Day
Fingers can naturally swell throughout the day.
Find Your
Perfect Fit
Find the right ring size for a comfortable fit and reliable sensor contact. Choose the measurement method that works best for you.
Method 01
Measure with Ring Sizer
Use the app to quickly find your ring size using your finger or a ring that already fits.
Use a Ring You Already Own
Place a ring that fits you on the screen and adjust the guide to match its inner edge.
Measure Your Finger
Follow the on-screen guide to measure your finger width and find the closest ring size.
Method 02
Measure Manually
Use a strip of paper or soft measuring tape to measure your finger circumference.
Step 1
Wrap
Wrap the strip around the base of the finger where you'll wear your ring.
Step 2
Mark
Mark the point where the strip overlaps.
Step 3
Measure
Lay the strip flat and measure the length from the end to your mark.
Step 4
Check Your Size
Compare your measurement with the size chart below.
Find Your Size
Use your finger circumference or the inner diameter of a ring that already fits to find your size.
US size |
Inner Diameter |
Finger Circumference |
|---|---|---|
6 |
16.1 mm / 0.63 in |
51.3 mm / 2.01 in |
7 |
16.9 mm / 0.66 in |
53.8 mm / 2.12 in |
8 |
17.7 mm / 0.70 in |
56.4 mm / 2.22 in |
9 |
18.5 mm / 0.73 in |
58.9 mm / 2.32 in |
10 |
19.4 mm / 0.76 in |
61.8 mm / 2.43 in |
11 |
20.2 mm / 0.80 in |
64.3 mm / 2.53 in |
A Close, Comfortable Fit
Your ring should stay securely in place and maintain consistent contact with your skin without feeling too tight.
Fit Scale
Snug Fit
Ideal Fit
Loose Fit
Helpful Tips
Consider Your Knuckle
Make sure the ring can slide comfortably over your knuckle.
Don't Measure Too Tight
Measure snugly around your finger without pulling the strip too tight.
Between Sizes? Size Up
If your measurement falls between two sizes, choose the larger size.
