Oura Ring 4 Ceramic Petal – Sleep, Activity & Womens Health, 8-Day Battery, Android & iOS

Overview

The Oura Ring 4 Ceramic in Petal blends refined style with durable everyday wear. Its ceramic exterior delivers a premium look, while recessed interior sensors provide gentle contact on the skin, making it comfortable for long sessions. Powered by Smart Sensing, the ring adapts to your finger to deliver continuous data as you sleep, move, and unwind.

In the Ceramic Collection, sizes 4–15 and colors Petal, Tide, and Cloud offer a color that suits your mood and wardrobe. With up to eight days of battery life, you can wear it through workouts, commutes, and nights without constant charging. The experience pairs with the Oura app to surface practical insights you can act on — without feeling overwhelmed.

What it tracks

• 50+ health metrics including sleep quality, daily activity, stress, heart health, and Womens Health indicators.
• Personalized insights that highlight patterns, support thoughtful planning, and help you monitor changes over time.

Real world uses

From workouts to winding down, the discreet form stays on, offering subtle confirmations of progress. See how readiness shifts after changes to sleep, activity, or routine.

Fit, care, and setup

• ACCURACY - SMART SENSING adds adaptive tracking for day and night use across 50+ metrics.
• Sizing Kit helps you find your best fit before purchasing for comfort and data quality.
• Battery life: up to 8 days per charge, with no screens or vibrations to distract you.

HSA/FSA eligibility allows you to use eligible funds for Oura Ring, extra chargers, and shipping. The first month of Oura Membership is included with your purchase; ongoing access is via a monthly plan in the app.

Care and maintenance

To keep your ring looking its best, use the Ceramic Polishing Pad after syncing in the app. On the ceramic surface, metal transfer can appear as grey marks; these are removable with proper cleaning. Handle metal objects with care during certain activities.