The Oura Ring 5 is here, and it's noticeably thinner than its predecessors. After a few days of wear, the standout feature is its size: it's the most comfortable smart ring I've ever worn.

The Oura Ring 5 is getting closer to the size of a non-smart ring

In photos comparing the Oura Ring 5 (gold) to the Oura Ring 4 (black) and regular jewelry, the difference is dramatic. The new ring is significantly slimmer, making it far less conspicuous.

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The Oura Ring 5 is definitely the smallest smart ring I’ve ever seen

Direct comparisons with competitors like the Samsung Galaxy Ring, Ultrahuman Ring Air, and RingConn Gen 3 confirm the Oura Ring 5 is the thinnest on the market.

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Here’s how the Oura Ring 5 compares to previous generations of Oura Rings

Compared to its own lineage (Oura Rings 3, 4, and 5), the 5 brings back subtle internal sensor bumps for better skin contact, while maintaining a flush interior. The result is a refined, more comfortable fit.

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Is the Oura Ring 5 worth the upgrade?

The Oura Ring 5 is a clear upgrade in terms of design and comfort, with a more scratch-resistant finish. Upgrading from an Oura Ring 4 offers modest gains, but the real issue is battery longevity. Oura rings have a documented history of battery degradation around the two-year mark, often coinciding with the release cycle of new models. Oura has not shared specific plans for improving battery lifespan.