Oura Ring 5 is 40% More Compact: How the Company Solved the Smart Ring Problem

Oura has released an updated version of its flagship device—the Oura Ring 5. The key innovation is a 40% reduction in size compared to the previous model. This achievement was made possible by a complete redesign of the internal architecture, including sensors and battery, without compromising functionality.

Developers optimized component placement, reduced the number of sensor channels, and enhanced their efficiency. Specifically, sensor orientation was adjusted, and more powerful LEDs were used for precise data collection. Meanwhile, the device’s battery life remains unchanged—up to a week on a single charge.

The Oura Ring 5 demonstrates how wearable device manufacturers can incorporate user feedback, particularly from women, for whom comfort and ergonomics are often overlooked. Unlike many smartwatches, which see only minor size adjustments, Oura took radical steps by rethinking the design from the ground up.

The new model could set a benchmark for the industry, where convenience is often sacrificed for technical specifications. Now, users can wear the ring continuously, even during workouts or physical labor, without discomfort.