Oura Ring 5 debuts with slimmer design and smarter health tracking

Smart rings have spent years sitting somewhere between gadget and jewelry, often with a profile that looked more technical than tailored. Oura Ring 5 narrows that gap with a 40% smaller body than Oura Ring 4, measuring 6.09 mm wide and 2.28 mm thick, a scale that makes it easier to imagine on a hand already wearing a wedding band, a signet, or a slim gold stack.

Oura introduced the new ring on May 28 with a titanium build, waterproof construction and battery life rated at 6 to 9 days. The company says the sensor package is next-generation and that the software combines clinical history with real-time biometrics for a more predictive view of health. That is the kind of language smart-ring makers have long promised; the difference here is that the hardware finally sounds as if it has caught up to the idea. The shape is less like a miniature device and more like an understated band that can move from office desk to gym bag without changing its identity.

Pricing also matters because it decides whether a piece reads as a novelty or an everyday buy. Oura’s store lists the ring at $399 in black and silver, with stealth, brushed silver, gold and deep rose at $499. Preorders are open and shipping begins June 4. For a category that often asks buyers to overlook bulky proportions in exchange for tracking data, that starting price is more convincing than the visual compromises smart jewelry usually demands.

The launch also lands at a pivotal moment for Oura itself. TechCrunch reported on May 22 that the Finland-based company confidentially filed to go public, while Oura Ring 5 follows Oura Ring 4, which launched in October 2024 and had already been Oura’s lightest version. Oura has helped push smart rings from niche wellness accessory toward the mainstream, alongside competitors such as Samsung and Ultrahuman, but Ring 5 is the first version that feels fully attuned to daily dressing rather than just daily metrics.

Preorder it if you want health tracking in a ring that can disappear into a work wardrobe and still hold its own beside fine jewelry. Skip it if you want a statement piece or already find Ring 4 discreet enough, because the real upgrade here is refinement, not reinvention.