Oura Ring Gen 4

Bought it in October 2025; it is like new with a few surface scratches which is common with all of them.
SIZE 6
I paid $349+tax
It comes with box and charger

Introducing Oura Ring 4: the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most — your health. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn’t just measure your biometrics, it adapts to you, providing insights into over 50 health metrics including sleep, readiness, activity, heart health, stress and women’s health. Oura Ring quietly and comfortably monitors your health and with up to 8 days of battery life — you can forget it’s even on.

Sleeker, smarter, and more accurate than ever, Oura Ring 4 is made for you.