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Size before you buy.

Oura Ring sizes are different than standard ring sizes. Order a sizing kit or try on sample sizes in store to find your perfect fit.

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Overview

The Oura Ring 4 Ceramic in Cloud, Size 9 is a discreet smart ring with Smart Sensing — tracking 50+ signals across sleep, readiness, heart, stress, and metabolic health.
  • Up to 8 days of battery, no screens, no buzz. Daily Readiness Score from sleep, HRV, blood oxygen, and temperature trends
  • Pairs with the Oura app on iOS or Android. First month of membership included; $7.99/mo after
This description was generated by AI and reviewed for accuracy.

Oura Ring 4 Ceramic Smart Ring with Health, Sleep & Fitness - 36-Day Battery - Cloud - Size 9

Brand: Oura
Model: JZ90-57460-09
Web Code: 19416648
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Manufacturer's Warranty

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For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

What's included:

  • Oura Ring 4 Ceramic
  • OR4 Charger
What You Need To Know
  • Sleep, recovery, and 50+ health metrics in a premium ceramic ring — Smart Sensing built in, exclusive to Best Buy
  • Tracks sleep stages, 24/7 heart rate, HRV, blood oxygen, temperature, stress, metabolic, and women's health signals
  • Comfortable enough for 24/7 wear — no screens, no buzz, no notifications competing for attention
  • Premium ceramic build with Smart Sensing that adapts to your finger — and up to 8 days of battery
Better Sleep, Backed by Smart Sensing
  • Reads overnight signals — sleep stages, resting heart rate, HRV, and skin temperature — into a clear Sleep Score and Readiness Score each morning
  • Smart Sensing continuously adapts to your finger to keep readings accurate
  • Patterns emerge over time, showing what helps (or hurts) your rest
24/7 Health Signals — 50+ Metrics, One Picture
  • Tracks 50+ health metrics — heart rate, HRV, blood oxygen, skin temperature, and stress
  • Includes metabolic health and women's health signals
  • Auto-detects activities, monitors stress, and predicts your cycle
  • A single, complete picture of wellness — without the noise of a smartwatch
  • Stress Resilience visualization shows how your body handles daily pressure
  • Cardiovascular Age and Cardio Capacity add a heart-health dimension
Premium Ceramic, Built for All-Day Wear
  • Crafted in premium ceramic — smooth, refined, and quieter on your finger than titanium
  • Water-resistant for showering and handwashing
  • Quiet enough to wear overnight
  • Compared with the titanium Ring 4, the Ceramic version offers a distinctly different look and feel — smoother and more refined
Works With the Oura App — Exclusive to Best Buy
  • Pairs via Bluetooth with the Oura app on iOS and Android
  • First month of Oura Membership included with purchase
  • Membership is $7.99/month after — unlocks personalized insights, advanced metrics, and ongoing coaching
  • Exclusive to Best Buy — backed by Best Buy's trusted service
  • Syncs with 40+ apps via Apple Health, Google Fit, Health Connect, Strava, and Natural Cycles
  • Oura Advisor is an AI-powered health coach that helps you understand your biometrics
  • Membership is $7.99/month or $89.99/year, with the first month included (new members only)
About This Variant: Cloud, Size 9The Cloud ceramic finish has a refined, polished feel — premium-looking and easy to wear daily. Size 9 is a mid-range fit; even so, finger sizes change with temperature and time of day, so the Oura Sizing Kit is the safest way to confirm before ordering.This description was generated by AI and reviewed for accuracy.

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.