I’ve always preferred to wear my Oura ring on my ring finger. The company says that “for optimal performance and accuracy,” it’s best to wear it on your index finger, but that any finger can work. And ...

Examine your fingers. Which is longer? Is it the index finger (the finger you use to point with – technically the second digit, or 2D, counting the thumb), or the ring finger (the fourth digit, or 4D) ...