Oura Ring 4 Brushed Silver Size 12 - Comfortable 24/7 Health Tracker

Our review of the Oura Ring 4 finds it best suited to people who want continuous, low-profile health tracking without a wrist device. The ring's primary appeal is quiet, day-and-night monitoring of sleep, readiness, activity and heart health using the new Smart Sensing platform, and the updated all-titanium shape makes it comfortable for 24/7 wear. Buyers should size themselves with the included sizing kit before ordering, because Oura Ring 4 does not follow standard ring sizing and correct fit is essential to accurate readings.

Key Features

• Smart Sensing: Adaptive sensors deliver continuous, personalized tracking across more than 50 health metrics for clearer sleep and readiness insights.
• All-titanium design: A durable but lightweight construction that is water resistant and intended to be comfortable for extended wear.
• Long battery life: Up to 8 days between charges so users can forget the device during workouts, workdays and nights of sleep.
• Membership included: First month of Oura membership is included for new members, with ongoing subscription options by month or annual prepaid for those who want deeper insights.
• Size before you buy: The Sizing Kit is required because Oura Ring 4 uses its own sizing system and a proper fit improves sensor accuracy.

Who It's For

The Oura Ring 4 is ideal for sleepers and health-conscious users who prioritize unobtrusive, accurate biometric tracking over a flashy screen. People who want detailed sleep cycles, stress and women's health metrics will appreciate continuous measurements without a wrist-based device getting in the way.

It is less suitable for buyers who need a device with a display, tactile notifications, or those unwilling to use a sizing kit. Also consider other wearables if scratch resistance is a top concern, since some customers report surface sensitivity over time.

Pros & Cons

Pros

• Very comfortable for 24/7 wear with a refined, lightweight titanium build.
• Comprehensive sleep and readiness tracking backed by adaptive Smart Sensing.
• Long battery life that often lasts several days and reduces charging interruptions.
• First month of membership included, giving immediate access to app insights.

Cons

• Sizing requires the separate Sizing Kit because the ring uses nonstandard sizes and fit affects accuracy.
• Some users report concerns about scratch resistance on the finish over time.

Specifications

Model	Oura Ring 4
Finish	Brushed Silver
Material	All-titanium
Battery life	Up to 8 days
Metrics tracked	Over 50 metrics including sleep, activity, stress and women's health
Membership	First month included; subscription optional (monthly or annual)
Sizing	Size Before You Buy Sizing Kit required; not US standard sizing

Our Verdict

The Oura Ring 4 is a well-crafted, unobtrusive health ring that delivers reliable sleep and readiness data for users committed to continuous tracking. When sized correctly with the Sizing Kit, it offers long battery life, comfortable all-day wear and deep insights through the Oura membership, making it a strong value for people who prioritize accurate, low-profile biometric monitoring.

Frequently Asked Questions

Do I need the sizing kit?
Yes. Oura Ring 4 uses its own sizing system and the Sizing Kit ensures an accurate fit, which improves sensor performance.

Is membership required?
Membership is not tied to the ring itself but to your account; a first month is included for new members and ongoing options are monthly or annual.

How long does the battery last?
The ring is rated for up to 8 days of battery life, allowing extended tracking between charges.