Oura Ring 5 review: is the world’s smallest smart ring worth £399 in the UK?

This Oura Ring 5 review lands on a simple question for UK buyers: the world’s smallest smart ring costs £399 for Silver or Black and £499 for premium colours, so is the slimmer hardware and the mandatory £5.99-a-month membership worth a £50 jump over the Ring 4? My answer, built from Oura’s published specs and the first wave of owner reaction, is a qualified yes for newcomers and a clear no for anyone already wearing a Ring 4. Oura announced the Ring 5 on 28 May 2026 (confirmed by CNBC the same day) and it reached UK shelves on 4 June 2026.

How much does the Oura Ring 5 cost in the UK, and what is the real price?

The sticker price is only half the story. Oura sells the Ring 5 at £399 in Silver and Black, rising to £499 for the four premium finishes, Gold, Stealth, Brushed Silver and Deep Rose. That is a £50 increase over the Ring 4’s launch price, a rise CNBC flagged in its 28 May 2026 coverage. The number that actually matters, though, is the subscription. Without an Oura Membership at £5.99 a month or £69.99 a year, the ring degrades to a barebones tracker. The5krunner put it bluntly on 28 May 2026: for most people the real cost of an Oura is not the ring, but the membership that makes either one work. Budget for the hardware plus roughly £70 every year you keep it, and the Ring 5 starts to look less like a one-off purchase and more like a standing direct debit.

If you are weighing a smart ring against a wrist wearable, that running cost is the first thing to reconcile. A one-off watch with no subscription can work out cheaper over three years, which is worth bearing in mind if you have been reading our take on whether to hold onto your existing smartwatch rather than buying new.

Is the smaller, lighter design a genuine upgrade?

The shrink is the headline feature and the one I think most people will actually notice. Oura is marketing the Ring 5 as the world’s smallest smart ring, about 40% smaller than the Ring 4. Trusted Reviews measured it at 6.09mm wide and 2.28mm thick, down from 7.9mm and 2.8mm, with the lightest size weighing roughly two grams. For a device you are meant to forget you are wearing, dropping that much bulk is the right priority, and the new waterproof-to-100m rating means you no longer have to think twice about swimming or showering in it. The premium finishes look genuinely jewellery-like rather than gadget-like, which matters when the whole pitch is something you wear every hour of every day.

There is a catch buried in the spec sheet, though, and it is one early owners have already hit. The5krunner noted on 28 May 2026 that Oura narrowed the size range to 6-13, down from the Ring 4’s 4-15, so people with very small or very large fingers may no longer find a fit. If you are upgrading, do the free sizing kit again before you commit; your old size is not a guarantee.

For most buyers the real cost of an Oura is not the ring at all, it is the membership that makes it work. Factor that in before the slimmer titanium seduces you.

Does the Oura Ring 5 actually track your health more accurately?

This is where Oura’s marketing gets interesting, and slightly counterintuitive. The Ring 5 tracks 50+ health metrics across sleep, activity, heart health, stress and body temperature, and Oura calls it the most accurate generation yet. Yet it does so with fewer signal pathways than the Ring 4, 12 versus 18, a point Wareable and Android Central both highlighted in their late-May comparisons. Oura’s argument, reported by Tech Advisor, is that the LEDs are roughly four times more powerful and the low-profile sensor domes sit closer to the skin, delivering a pulse signal it claims is up to 100 times stronger than wrist-based devices. On paper that should improve readings across more finger sizes and skin tones, which has historically been a weak spot for optical sensors.

I would treat the accuracy claims with measured optimism until independent long-term data arrives. The sleep tracking on the Ring 4 was already among the best in the category, so the bar is high. If detailed sleep staging is your main reason for buying, the Ring 5 is the most capable version yet, but the leap over the Ring 4 is evolutionary, not revolutionary.

Should Oura Ring 4 owners upgrade?

No, and I do not think it is a close call. The Ring 4 is not even two years old, and most of the software features that make Oura worthwhile already reach older rings through app updates. The5krunner reached the same conclusion on 28 May 2026, arguing that the features that matter are already coming to your existing ring, so paying £399 to upgrade is hard to justify. The genuine gains, slimmer hardware, the modest battery bump and deeper waterproofing, are comfort and convenience improvements, not reasons to write off a perfectly good device.

Early community reaction has not been uniformly glowing either. In owner discussion gathered by The5krunner around the 28 May 2026 launch, at least one long-term Ring 4 user flagged durability and after-sales support, describing a ring that failed shortly after the warranty lapsed and a replacement discount they felt was stingy. That is a single data point, not a pattern, but it is the kind of total-cost-of-ownership question a £399 device plus a perpetual subscription deserves. If you are coming from a wrist tracker like the Garmin Forerunner 970 or eyeing the Pixel Watch, the ring’s no-screen, all-day discretion is the real differentiator, not raw accuracy.

How does it compare with the Samsung Galaxy Ring?

Oura’s biggest advantage right now is that the competition has gone quiet. The Ring 5 arrived just as the smart-ring market’s other big name, Samsung’s Galaxy Ring, has stalled, which leaves Oura with an unusually clear run at new buyers. The trade-off is the one I keep returning to: Samsung’s ring carries no mandatory subscription, while Oura’s best insights are locked behind the membership. If you want the deepest sleep and readiness analysis and you are happy to pay for it monthly, Oura is the more polished system. If a recurring fee is a dealbreaker, read our long-term Galaxy Ring review before you decide, and our wider guide to the best Android kit this year if you are still building out your setup.

Where to buy the Oura Ring 5 and check the price

The Oura Ring 5 sells direct from the Oura UK store at £399 (Silver, Black) and £499 (Gold, Stealth, Brushed Silver, Deep Rose), with the optional Charging Case at £99 and membership at £5.99/month or £69.99/year. UK availability has also been listed through Amazon UK and selected retailers, though stock and finish choice vary, and Oura warned at launch that some styles could take up to three weeks to ship. Order the free sizing kit first; getting the fit wrong is the single most common regret with any smart ring. Last checked: 2026-06-22.

My honest call: the Oura Ring 5 review verdict

The Oura Ring 5 is the best smart ring you can buy in the UK today, and for a first-time buyer who values discreet, screen-free health tracking I would recommend it without much hesitation. It is smaller, lighter, tougher and, on Oura’s numbers, more accurate, and it lands at a moment when its nearest rival has lost momentum. What stops me short of a full-throated rave is the maths. The £50 price rise is easy to swallow; the perpetual £69.99-a-year membership is the part you must make peace with, because it never goes away. Ring 4 owners should sit this one out and let the software updates do their work. Newcomers who have done the subscription sums should buy with confidence.

My score: 8.5/10