Oura Ring 4 Ceramic Cloud (Size 5) — Sleep, Activity & Women’s Health | Up to 8 Days Battery | Android & iOS

Meet the OURA Ring 4 Ceramic Cloud, a refined wearable that blends premium zirconia ceramic with everyday durability. Designed to move with you from morning routines to evening wind-downs, its recessed interior sensors sit softly against the skin for a comfortable, low-profile wear. Powered by Smart Sensing, the ring adapts to your finger to deliver continuous data day and night, helping you see your habits in a new light. With up to eight days of battery life, you can rely on a complete picture of your rhythms without daily charging interruptions.

What it tracks and how it helps you

• Tracks more than 50 health metrics including sleep, daily activity, stress, heart health, metabolic health, and women’s health metrics.
• Smart Sensing adjusts to your finger, delivering accurate, ongoing data without interruptions from screens or alarms.

• Personalized insights highlight patterns of rest, activity, readiness, and recovery, helping you plan your days with intention.
• Colorful ceramic exterior options—Petal, Tide, and Cloud—let the ring reflect your style while staying durable for daily wear.

Sizing, care, and setup

Important sizing note: use the Oura Ring Sizing Kit before purchase. The ring uses a sizing system different from standard jewelry, and the right fit is key for comfort and data accuracy. The first month of Oura Membership is included with new rings; ongoing membership is billed separately within the app.

• Sizing kit helps ensure precision and comfort from day one.
• HSA/FSA eligible for the ring, extra chargers, and shipping.

The Ceramic Polishing Pad is available to help maintain the ring’s finish over time. If color transfer appears from metal objects, it’s a surface change that can be cleaned and managed with care.

Tech you can rely on

The OURA Ring 4 relies on Smart Sensing to provide stable data around the clock, with a lightweight, screen-free design that supports your daily life and activities. The durable ceramic exterior is built to keep up with busy days and nights, while the companion app translates raw numbers into practical insights to help you explore your routines with curiosity.