Oura Ring - Black - Size 4

The Oura Ring should fit snugly on your finger, similar to a wedding band, but not so tight that it restricts blood flow or causes discomfort. You should not be able to easily slide it off. If you can, it's likely too big. If it pinches or feels uncomfortable, it's too small.

The Oura Ring tracks over 50 health metrics, including sleep stages, sleep duration, heart rate, heart rate variability (HRV), body temperature, respiratory rate, activity levels, calories burned, and readiness scores.

While the ring itself and basic tracking are available without a subscription, advanced insights, personalized recommendations, and a deeper analysis of your health trends are typically unlocked through an Oura membership.

The Oura Ring 4 Ceramic typically offers a battery life of 5 to 8 days on a single charge, depending on usage and settings.

Yes, the Oura Ring 4 Ceramic is water-resistant up to 100 meters (328 feet), making it suitable for swimming, showering, and other water-related activities.

Given the 5-8 day battery life, you will typically need to charge the ring once a week. The Oura app will notify you when the battery is low.

The Oura Ring 4 Ceramic features a high-performance ceramic exterior. The interior contains recessed sensors made with biocompatible materials.

Ensure Bluetooth is enabled on your device, the ring is charged, and you are within Bluetooth range. Try restarting both your device and the ring (by placing it on the charger).

Verify the ring is worn correctly on your finger (snug but comfortable). Ensure the sensors are clean. Check for app updates, as algorithms are regularly refined.

Clean the charging contacts on both the ring and the charger. Ensure the charger is properly connected to a power source. Try a different USB port or power adapter.

Ensure you have the correct size. The ring should fit snugly but not too tightly. If irritation occurs, remove the ring and consult the care instructions. Consider wearing it on a different finger.