Achieve the most accurate health tracking with the Oura Ring 4 Sizing Kit. This essential accessory from Oura ensures your smart ring fits perfectly, providing comfort and reliable data. Use it to test the fit for 24 hours before purchasing your actual ring.
The Oura Ring 4 Sizing Kit allows you to find the ideal fit before purchasing. Oura Ring sizes are slightly different from standard ring sizes, so it is important to size yourself using our sizing tools. A properly fitting Oura Ring will result in the highest possible data accuracy, comfort, and overall experience.
