Oura has unveiled its fifth-generation smart ring, the Ring 5, which is touted as the world's smallest smart ring, starting at $399. This new model is 40% smaller than its predecessor and features improved battery life, lasting between six to nine days. It comes with significant software updates, including 'Health Radar' for tracking blood pressure and nighttime breathing patterns, enhancing user health insights. The Ring 5 will be available for pre-order today, with shipping set to begin on June 4. Users can choose from sizes 6 to 13 and six finishes, with prices ranging from $399 for basic colors to $499 for premium finishes. In response to user feedback for a slimmer design, Oura has reduced the ring's dimensions, making it more appealing to a broader audience. Additionally, the company has partnered with Counsel Health to provide on-demand medical advice through the app, further integrating health monitoring with care options. The Ring 5's launch comes amid increased competition in the smart ring market, prompting Oura to innovate more rapidly.