HSA/FSA eligible
Oura Ring 4 Ceramic
Naturally colorful. Powerfully personal.
Advanced in every way
Oura Ring 4 Ceramic is built for 24/7 comfort with 5-8 days of battery life.** Smart Sensing technology adapts to your finger to deliver highly accurate, continuous data. All Oura Ring 4 styles provide valuable insights into your holistic health – sleep, activity, stress, women’s health, and more.
Ceramic like you’ve never seen
Thoughtfully crafted in high-performance zirconia ceramic, Oura Ring 4 Ceramic combines refined elegance with material innovation. Each ceramic ring goes through a traditional firing process that strengthens the material and gives it a smooth, polished finish.
Made for you and all you do
Show your true colors and choose from four stunning new finishes to express your individuality. If you own two or more Oura Ring 4 styles, you can now easily switch between different finishes to suit your mood, style, and energy.
Experience the science of self-care
Track over 50 health and wellness metrics, and get personalized insights into your sleep, activity, stress, metabolic, heart health, and women’s health. With innovative, AI-powered tools like Oura Advisor, get exclusive access to actionable insights that become increasingly tailored over time.
Heart Health
Sleep & Rest
Activity & Movement
Stress
Women’s Health
Metabolic

Frequently Asked Questions

What's Included
- Oura Ring 4 Ceramic
- Size-specific charger
- USB-C cable
- Ceramic Polishing Pad
Tech Specifications
Sensors
- 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
Compatibility
- 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
Weight and Dimensions
- Width: 7.9 mm
- Thickness: 3.51 mm (similar to a wedding band)
- Weight: 5.1 - 8.1 g (depending on ring size)
Battery Life
- 5-8 days of battery life**
- Typically charges in 20-80 minutes, depending on battery level
Quality Materials
- High-performance zirconia ceramic exterior
- Seamless titanium interior
- Water resistant up to 100m/328 ft
- Minor scratches from regular wear are normal
- Erasable scuffs may occur while handling metal objects
Connectivity
- Bluetooth Low Energy
- Automatic firmware updates via Oura App
- EMF-safe
- Supports airplane mode
- FCC-certified
- * Your Oura Membership will automatically renew on a monthly or annual basis until you cancel. You may cancel at any time. Cancellation will take effect at the end of your current automatic renewal term. Canceling does not entitle you to a full or pro-rated refund of any paid fees. If you do not cancel before the end of any free trial or any prepaid membership term, your Oura membership will automatically renew and you will be charged at the applicable rate for your selected membership term.
- ** Battery life and longevity depend on Oura Ring size, Oura App settings, feature configuration, activity, battery age, usage, and many other factors; actual results will vary. Battery life and charge cycles vary by use and settings. Battery tests were conducted across various sizes and scenarios. See Oura Ring 4 Battery Life and Ring Battery Tips for more information.