Ring 5 / Oura
The Oura Ring 5 is the smallest the company has made, around 40% slimmer than the Ring 4 at 6.09mm wide and 2.28mm thick, and light enough at roughly two grams to be forgotten on the finger. The case is titanium inside and out, in the matte Stealth finish here, with a strengthened scratch-resistant coating and water resistance to 100 metres. Redesigned low-profile sensor domes and twelve signal pathways read heart rate, temperature and movement more consistently across finger types and skin tones, feeding fifty-plus sleep, activity and recovery metrics to the phone app. It suits someone who wants continuous health sensing without a screen on the wrist, and who accepts that the insight lives behind a paid Oura membership rather than in the ring itself.
Design intent
- +Shrinking the ring by 40% is the central decision: new low-profile sensor domes and a re-engineered battery let the full sensing platform fit a band thin enough to wear like ordinary jewellery, which is what makes continuous day-and-night wear realistic.
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The Oura Ring 5 is the smallest the company has made, around 40% slimmer than the Ring 4 at 6.09mm wide and 2.28mm thick, and light enough at roughly two grams to be forgotten on the finger. The case is titanium inside and out, in the matte Stealth finish here, with a strengthened scratch-resistant coating and water resistance to 100 metres. Redesigned low-profile sensor domes and twelve signal pathways read heart rate, temperature and movement more consistently across finger types and skin tones, feeding fifty-plus sleep, activity and recovery metrics to the phone app. It suits someone who wants continuous health sensing without a screen on the wrist, and who accepts that the insight lives behind a paid Oura membership rather than in the ring itself.
Design intent
- +Shrinking the ring by 40% is the central decision: new low-profile sensor domes and a re-engineered battery let the full sensing platform fit a band thin enough to wear like ordinary jewellery, which is what makes continuous day-and-night wear realistic.
- +Placing the sensors on the finger rather than the wrist gives more consistent contact for heart-rate and temperature readings, and the deliberate absence of a screen keeps the device to one job: sensing, not notifying.
Trade-offs
- -Most of what the ring is for sits behind an Oura membership at £5.99 a month or £69.99 a year; without it the hardware reports only limited data, so the true cost is ongoing rather than one-off.
- -A sealed ring this small carries a non-replaceable battery that degrades with every charge cycle, giving it a finite usable life unlike a repairable object, and it depends entirely on the phone app to mean anything.
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