Quickly get your ring size:
To measure, you will need a strip of paper, scissors, a pen, and a ruler or measuring tape. For optimal comfort and sleep tracking, wear the Smart Ring on your index, middle, or ring finger. Ensure a snug fit, not too tight or loose.
Use a strip of paper or string around the thickest part of the finger and pull it tight
Mark the intersection with a pen
Remove the strip or string, straighten it, and measure the length to get the circumference
Use measured circumference of your preferred finger and pick your size from the above table
Between Sizes? Pick the size that slides over your knuckle comfortably and use a spacer to fine-tune the fit.