Oura Ring Gen3 Sizing Kit

Oura Ring sizing is slightly larger than the US Standard. The Oura Ring Sizing Kit allows for you and those around you to find the ideal fit before purchasing. A proper fitting Oura Ring will result in the highest possible data accuracy, comfort, and overall experience.
Choose a finger
The Oura Ring works on all fingers and can be worn on either hand. For optimal performance and accuracy, we recommend wearing your Oura Ring on your index finger.
Find your fit
Your Oura Ring should fit tightly and securely around the base of your finger, but not to the point where it’s uncomfortable. The right size is one that’s comfortable to wear for extended periods and doesn’t feel too tight during daily wear.
Wear test
Your fingers expand and contract based on environmental factors, so we recommend wearing your ring sizer for at least 24 hours to confirm your best fit. Your ring should not rotate as you go about normal daily tasks.
Sizes
The Oura Ring is available in sizes 6–13, and we currently do not offer half-sizes. Oura Ring sizes are slightly different from standard ring sizes.
Materials
Our ring sizers are made of plastic, while the Oura Ring is crafted with titanium and has a seamless inner molding for comfort. Due to the plastic mold used to make our ring sizers, they may seem less comfortable than the actual Oura Ring you’ll end up receiving.
Between Sizes?
If you’re in between sizes, we recommend choosing the smaller of the two, as it’s important for the ring’s sensors to always remain in contact with your skin for a stronger signal. You can also try wearing it on a different finger.