xpertly crafted for quality and precision, Oura Ring 4 provides valuable insights into your holistic health – sleep, activity, stress, heart health, cycle and more. Our new Smart Sensing technology provides enhanced accuracy, deeper personalization, and longer battery life. Sleek, fully-titanium design and discreet sensors provide 24/7 comfort. With 5-8 days of battery life per charge, never miss a beat when it comes to tracking your health.
How do I choose the right size for my Oura Ring?
We recommend you use an Oura Ring sizing kit before selecting your Oura Ring size. The kit includes plastic ring sizers corresponding to Oura Ring sizes, which differ slightly from standard ring sizes (note: half sizes are not available).
For accuracy, wear the sizing ring for at least 24 hours, including while sleeping, before finalizing your size. If you’re between sizes, we recommend choosing the smaller size for a more secure fit.
Oura Ring gives a complete picture of your health, including:
ReadinessSleepActivityDaytime Stress and ResilienceHeart Health: Cardiovascular Age and Cardio CapacityWomen’s Health: Cycle Insights, Fertile Window, and Pregnancy Insights
Tech Specifications
- Red and infrared LEDs measure blood oxygen levels
- Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate
- Digital sensor measures temperature trends
- Accelerometer tracks movement and activity 24/7
- Oura App is available in English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, and Danish
- Supports metric and imperial units of measurement
- Integrates with 40+ apps
- Available on iOS and Android
- Width: 7.90mm
- Thickness: 2.88mm
- Weight: 3.3 to 5.2 grams (depending on Oura Ring size)
- 5-8 days of battery life
- Typically charges in 20-80 minutes, depending on battery level
- Non-allergenic titanium on inner & outer surfaces
- Seamless titanium interior
- Water resistant up to 100m/328 ft
- Minor scratches from regular wear are normal
- Bluetooth Low Energy
- Automatic firmware updates via Oura App
- EMF-safe
- Supports airplane mode
- FCC-certified
