Which is the best finger to wear an Oura ring on?

The optimal finger to wear an Oura ring on is typically the index finger, though it can also be comfortably worn on the middle or ring finger. The choice of finger may depend on personal comfort and fit, as one's dominant hand, adjacent finger size, and daily activities can influence which position offers the best balance of security and accuracy for the biometric sensors that work within the ring. It's important to ensure that the ring fits snugly but not too tight, allowing for accurate tracking of physiological metrics such as heart rate, body temperature, and movement during sleep and activity. Ultimately, Oura suggests trying different fingers to see which one provides the best fit and consistent readings.