Oura has released the Oura Ring 5, a health-tracking wearable featuring a smaller form factor and improved battery performance.

The release marks a shift toward minimizing the physical footprint of smart rings to increase user adoption and comfort. As wearables move from niche gadgets to mainstream health tools, the ability to track biometrics without a bulky device is critical for long-term compliance.

The Oura Ring 5 is 40 percent smaller than the Oura Ring 4 [1]. This reduction in size aims to make the device less intrusive for users who find traditional smart rings cumbersome. According to reports, the device now features a nine-day battery [2], allowing users to track health metrics for over a week without needing a charger.

James Ittmann of The Guardian said the new device is "slimmer, longer lasting and much easier to live with, new Oura sets a very high new bar for health-tracking wearables". The focus of the fifth generation is on refining the hardware to make it an irresistible alternative to traditional smartwatches.

While the device offers significant improvements in ergonomics, some reviewers suggest the value proposition differs based on the user's current hardware. For newcomers, the Oura Ring 5 serves as a primary entry point into biometric tracking. However, those who already own the Oura Ring 4 may find the incremental changes less compelling than the leap for first-time buyers.

The device continues to focus on core health metrics, such as sleep quality and readiness, while leveraging the smaller chassis to improve the overall wearing experience. By prioritizing size and battery, Oura is positioning the ring as a discreet tool for continuous health monitoring.

“Oura Ring 5 is 40 percent smaller than the Oura Ring 4.”

The transition to a significantly smaller frame and longer battery life indicates that the smart ring market has moved past the proof-of-concept phase and is now in a refinement phase. By reducing the size by 40 percent, Oura is addressing the primary friction point of wearable rings—comfort—which may push more users to choose rings over wrist-based trackers for sleep and recovery monitoring.