Oura Ring 5 Is the Smallest Smart Ring Ever Made, and It Might Be the Most Important
TECHNOLOGY
The newest Oura Ring is 40 percent smaller, with next-generation sensing for best-in-class accuracy, week-long battery life, and powerful new software features.
Wearable health tech has spent years getting smarter. With Oura Ring 5, it just got significantly smaller, and the implications go well beyond form factor.
Oura announced the Ring 5 this week, and the headline number is striking: it's 40 percent smaller than Oura Ring 4, making it the world's smallest smart ring. But the size reduction isn't the story. It's the enabler. By shrinking the hardware without sacrificing accuracy, and pairing it with a sweeping new software platform, Oura is making a credible case that the smart ring is no longer just a wellness tracker. It's becoming a proactive health tool with clinical ambitions.
Engineering a Smaller Ring Without Compromise
Getting 40 percent smaller required rethinking everything. Oura's team rebuilt the mechanical, electrical, optical, battery, and sensing architectures from the ground up to achieve a thinner profile, smoother curvature, and a fit that's described as feeling completely natural on the finger. The new signal architecture uses precision-engineered sensor domes for better skin contact, more powerful LEDs, and twelve stronger signal pathways, delivering greater accuracy across more finger types and skin tones than any previous generation.
Chief Product Officer Holly Shelton put the engineering challenge plainly: "To make something 40 percent smaller without sacrificing an ounce of accuracy, we had to rethink every assumption, the sensors, the battery, the architecture, the geometry of the ring itself."
The ring comes in sizes 6 to 13 and launches in several finishes, including two new ones: a redesigned Gold in a lighter modern shade and Deep Rose, a rich copper-rose tone. It's also Oura's most scratch-resistant ring yet, rated dust and waterproof to 100 meters. Pricing starts at $399 for base finishes and $499 for premium. Pre-orders open today, with shipping starting June 4.
From Tracking to Action: The Software Story
The hardware is only half the announcement. Alongside Ring 5, Oura is unveiling a significant expansion of its software platform, and this is where the ambition gets genuinely bold.
Health Radar is the centerpiece. Building on the earlier Symptom Radar feature, Health Radar continuously monitors biometric signals in the background to surface patterns before they become problems. Two capabilities launch first: Blood Pressure Signals, which tracks nighttime cardiovascular patterns to detect signs of increasing blood pressure, and Nighttime Breathing, which gives members a 30-day rolling view of sleep-related breathing disturbances. Both were developed in collaboration with more than 40 in-house physicians and PhDs.
For members managing chronic conditions, Health Records brings clinical data, diagnosed conditions, medications, lab results, allergies, directly into the Oura app alongside daily biometric data, creating what the company describes as a privacy-first longitudinal health record. In partnership with Counsel Health, members in 43 U.S. states can now ask health questions and connect with licensed providers directly within the app.
Oura is also expanding into GLP-1 medication self-management, allowing users to log doses, track side effects, monitor weight, and view biometric trends all in one place, a timely addition as GLP-1 adoption continues to accelerate globally.
The Bigger Picture
Oura has always argued that the finger is the optimal place to measure health signals, arteries there produce a pulse signal up to 100 times stronger than at the wrist. Ring 5 makes that argument in a package so discreet that wearing it becomes a non-decision.
For anyone serious about understanding their health rather than just monitoring it, that combination of smaller hardware and smarter software is a compelling proposition. The future of preventative health is quiet, lightweight, and fits on your finger.
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