Oura launches Ring 5, world’s smallest smart ring, as it heads towards IPO

Oura shrinks its flagship wearable

Oura is using its latest hardware launch to show that the smart-ring category is moving from niche gadget to serious consumer health platform. The Finnish-US company introduced the Ring 5, which The Guardian reports is billed as the world’s smallest smart ring and arrives as Oura moves toward an expected public listing later this year. The timing is strategic: the company has already sold 5.5m rings since its early crowdfunding days and is trying to turn category leadership into durable public-market momentum. A smaller ring also helps address one of the biggest barriers to all-day wearable adoption: comfort.

The Ring 5 is designed to answer a common objection to smart rings: bulk. It is 40% smaller than the Ring 4, only 2.28mm thick, and promises longer battery life while still tracking sleep, stress, readiness and heart-health signals. Oura is pricing the device from £399, €399 or $399, with shipping due on 4 June, and continues to pair the hardware with a monthly subscription that unlocks the broader health insights in its app. That combination makes the product both jewellery-like hardware and a recurring software service.

A hardware launch with IPO stakes

The business story is as important as the product story. Smart rings remain much smaller than smartwatches, but shipments have been growing rapidly, and Oura has built a model that combines premium devices, subscription revenue and a strong wellness brand. The Guardian cites about 5 million paying subscribers, $1bn in 2025 revenue and an $11bn valuation, numbers that explain why investors are watching the company’s path to an IPO. Its reach now extends well beyond Finland, with offices, sports partnerships and a customer base spread across many countries. The opportunity remains large because rings still represent a small slice of wearable shipments compared with smartwatches, leaving room for growth if consumers decide a discreet sensor is easier to live with.

Oura’s challenge is to keep expanding without losing the simplicity that made the ring appealing to people who dislike watches or obvious tech. New software features, including early-warning health radar tools, sleep-breathing insights, blood-pressure related features and GLP-1 medication tracking, push the company closer to proactive health care. That could deepen engagement and widen its addressable market, but it also raises the bar for accuracy, privacy and responsible messaging. As a discreet device becomes a more influential health companion, Oura will have to prove it can scale trust as effectively as it scales hardware sales. That discipline will matter as investors scrutinise retention, subscription value and the credibility of increasingly medical-sounding features. The Ring 5 launch is therefore a test of product design and of whether Oura can defend premium pricing as larger technology companies watch the category.

The next signal to watch is whether Oura can translate a smaller device into broader demand without losing the premium positioning that made the ring category attractive in the first place.

Source: The Guardian.