Oura Ring 4 Brushed Silver Size 5 - Smart Ring Rings

In this review of the Oura Ring 4 Brushed Silver (Size 5) the bottom line is simple: this ring is for people who want continuous, low-profile health tracking without a wrist device. The reviewer found the ring's biggest appeal is its combination of discreet design and detailed biometrics powered by Smart Sensing, which adapts to your patterns to deliver sleep, readiness and activity insights. The caveat is sizing - the included advice to use the Oura Ring 4 Sizing Kit is essential because sizes differ from standard rings and a correct fit greatly affects accuracy and comfort.

Key Features

• Size before you buy: The sizing kit is recommended because Oura Ring 4 uses nonstandard sizing, and a proper fit improves sensor contact and data quality.
• Smart Sensing accuracy: Tracks over 50 health metrics including sleep, activity, stress and heart health, with adaptive sensing intended to improve readings over time.
• All-titanium design: The brushed silver finish and titanium build deliver durability while remaining comfortable for 24/7 wear and suitable for sensitive skin.
• Long lasting battery: Up to 8 days of battery life means less charging and more continuous data capture from workouts to sleep.
• Membership access: First month of OURA membership is included for new members, with ongoing subscription options billed monthly or annually for continued analytics.

Who It's For

The Oura Ring 4 suits people who prioritize sleep and recovery insights and prefer a compact, wearable form that does not buzz or display notifications. Athletes and busy professionals will appreciate the readiness and activity metrics paired with a long battery life that supports uninterrupted monitoring.

It is less suited to users who need rugged scratch resistance as some customers note surface wear over time, or those unwilling to size carefully before purchase. If you prefer a large-screen device with on-demand visible readouts, a smart ring's silent operation may not meet your needs.

Pros & Cons

Pros

• Excellent sleep and readiness tracking thanks to adaptive Smart Sensing.
• Discrete all-titanium design is comfortable for continuous wear and gentle on sensitive skin.
• Long battery life reduces interruptions and supports multi-day tracking.

Cons

• Sizing must be done with the Oura sizing kit because ring sizes differ from standard rings.
• Some users report limited scratch resistance on the surface over time.

Specifications

Our Verdict

The Oura Ring 4 Brushed Silver is a strong choice for anyone who values continuous, private health monitoring in a minimal form factor. When sized correctly it offers accurate sleep and readiness insights and reliable multi-day battery life, making it good value for users seeking deep biometric trends rather than on-device displays.

Frequently Asked Questions

Do I need the sizing kit?
Yes. Oura Ring 4 uses nonstandard sizes and the sizing kit is recommended to ensure accurate fit and sensor contact.

Is membership required to use the ring?
The ring works with the Oura App, and a free first month is included for new members; ongoing access to advanced analytics requires a subscription.

How long does the battery last?
Typical battery life is up to 8 days depending on usage, allowing multi-day wear between charges.