How tight should the Oura Ring fit on my finger?

The Oura Ring should fit comfortably snug on the finger, neither too tight nor too loose. It should sit firmly enough not to move around excessively during daily activities or while sleeping, ensuring accurate tracking of physiological signals such as heart rate and body temperature. However, it shouldn't be so tight that it restricts blood flow or causes discomfort. It's important to allow for slight fluctuations in finger size, which can occur naturally due to changes in body temperature or hydration levels. A good fit allows one to forget the ring is there while it reliably gathers data for health monitoring.