Oura Ring 4, Black, Size 5, Smart Wearable, Sleep, Fitness & Heart Rate Tracker, 8-Day Battery (Size Before You Buy)
Oura Ring 4, Black, Size 5, Smart Wearable, Sleep, Fitness & Heart Rate Tracker, 8-Day Battery (Size Before You Buy)
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Oura Ring 4, Black, Size 5, Smart Wearable, Sleep, Fitness & Heart Rate Tracker, 8-Day Battery (Size Before You Buy)

643 ratings
Oura Ring 4, Black, Size 5, Smart Wearable, Sleep, Fitness & Heart Rate Tracker, 8-Day Battery (Size Before You Buy)Oura Ring 4 Black Size 5Oura Ring 4 Rose Gold Size 10Oura Ring 4 Gold Size 15Oura Ring 4 Silver Size 13Oura Ring 4 Rose Gold Size 13Oura Ring 4 Brushed Silver Size 15Oura Ring 4 Stealth Size 9Oura Ring 4 Stealth Size 13Oura Ring 4 Gold Size 8Oura Ring 4 Brushed Silver Size 4Oura Ring 4 Sleep Fitness SmOura Ring 4 Black Size 12Oura Ring 4 Gold Size 14Oura Ring 4 Silver Size 14Oura Ring 4 Sleep Fitness SmOura Ring 4 Black Size 15Oura Ring 4 Brushed Silver Size 8Oura Ring 4 Sleep Fitness SmOura Ring 4 Sleep Fitness SmOura Ring 4 Sleep Fitness SmOura Ring 4 Black Size 9Oura Ring 4 Brushed Silver Size 6Oura Ring 4 Brushed Silver Size 10Oura Ring 4 Black Size 13Oura Ring 4 Stealth Size 14Oura Ring 4 Silver Size 9Oura Ring 4 Gold Size 6Oura Ring Sizing KitOura Ring 4 Brushed Silver Size 11Oura Ring 4 Stealth Size 12Oura Ring 4 Black Size 6Oura Ring 4 Silver Size 15Oura Ring 4 Stealth Size 5Oura Ring 4 Silver Size 10Oura Ring 4 Sleep Fitness SmOura Ring 4 Silver Size 7Oura Ring 4 Black Size 14Oura Ring 4 Gold Size 11Oura Ring 4 Sleep Fitness SmOura Ring 4 Black Size 8Little Fat 2025 Super personality Smart Ring Waterproof Fitness Activity Tracker for Men and Women Compatible with Android iOS US Size 8Oura Ring 4 Stealth Size 8Oura Ring 4 Silver Size 12Oura Ring Gen 4 Smart RingOura Ring 4 Gold Size 13Oura Ring 4 Silver Size 6Oura Ring 4 Sleep Fitness SmOura Ring 4 Silver Size 11Oura Ring 4 Stealth Size 10Oura Ring 4 Gold Size 4Oura Ring 4 Rose Gold Size 11Oura Ring 4 Black Size 11Oura Ring 4 Silver Size 4Oura Ring 4 Rose Gold Size 14Oura Ring 4 Gold Size 9Oura Ring 4 Sleep Fitness SmOura Ring 4 Brushed Silver Size 14Oura Ring 4 Rose Gold Size 15Oura Ring 4 Stealth Size 6Oura Ring 4 Sleep Fitness SmOura Ring 4 Black Size 7 Smart Ring Size First Oura Ring 4 Sizing Kit Sleep Tracking Wearable Heart Rate Fitness Tracker 8 Days Battery LifeOura Ring 4 Brushed Silver Size 13
Ring Size5
Actual ColorBlack

Key item features

  • SIZE BEFORE YOU BUY: Oura Ring 4 is different from standard ring sizing; order the Oura sizing kit and get $10 Walmart Cash toward your purchase of an Oura Ring 4
  • OURA MEMBERSHIP: First month of membership free with purchase – offer available to new members only; then $5.99/month or opt for $69.99/year annual prepaid option
  • APP-BASED MEMBERSHIP: Membership is tied to your Oura App account, not the physical ring
  • HEALTH TRACKING: Tracks over 50 metrics, including sleep, activity, stress, heart health, and women’s health metrics
  • SMART SENSING: Adapts to you and delivers accurate, continuous data day and night
  • BATTERY LIFE: Lasts 5-8 days* on a single charge
  • DISCREET DESIGN: No screens or vibrations so you can stay present — from workouts to nights out
  • DESIGNED FOR 24/7 WEAR: Oura Ring 4’s updated design is more comfortable, fits better than ever, and is water resistant
  • DURABLE DESIGN: The first all-titanium smart ring combines exceptional durability with a gentle touch, even for sensitive skin
  • SYNC WITH YOUR FAVORITE APPS: Compatible with iOS and Android — Oura seamlessly integrates with over 40 apps including Apple Health, Google Health Connect, Natural Cycles, Flo, Strava, & more
  • HSA/FSA ELIGIBLE: We can accept HSA or FSA funds for the following: Oura Ring, additional chargers, and shipping
  • LOOKING FOR THE BEST HEALTH TRACKER: Whether you’re searching for a sleep ring or fitness ring, Oura Ring is for you— this revolutionary smart ring that allows you to discreetly track your sleep, activity, recovery and stress - in style
  • Finish: Black
  • Size: 5

About this item

Product details

Specifications

Warranty

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Customer ratings & reviews

4.2 out of 5 stars
stars
643 ratings108 reviews
How item rating is calculated
  1. 5 stars70% (450)
  2. 4 stars10% (62)
  3. 3 stars5% (33)
  4. 2 stars4% (25)
  5. 1 star11% (73)

Reviews summary

Pros

  • : Provides metrics on sleep quality and duration.
  • : Provides clear health information and guidance.
  • : Provides accurate sleep tracking reports.
  • : Offers detailed recovery, sleep, and resilience insights.

Neutral

  • : Offers competitive pricing, but can be steep for certain models.
  • : Can be compact, but also feels cramped for larger users.
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Showing 1-3 of 108 reviews

Dec 5, 2025
Reviewer name: Walmart customer
Top Reviewer
Item details
Ring size: 9
Color: Gold
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Improved my quality of life wearing the Oura 4.

Wearing the Oura 4 allows me to use its data and improve the quality of my life. With informed decisions I can improve the quality of my life..i find the quality outstanding with little concern as I wear it daily and it stands up to all sorts of conditions. The best bang for my buck! I highly recommend you invest this life changing and extending your quality of life.

Helpful?2QIF0YX5NAD217962002078
Apr 29, 2026
Reviewer name: Hailee
Walmart Associate
Item details
Ring size: 9
Color: Silver
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Worth it!

For a while, I was skeptical about buying because of the price tag but also because it seems like everyone has a different opinion on what brand to get. In the end, I ended up purchasing this and I do not regret it at all!

Helpful?2QIF0YX5NAD217962002078
Jan 19, 2026
Reviewer name: Angela
Item details
Ring size: 8
Color: Silver
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Perfect

Love it the best ring ever

Helpful?2QIF0YX5NAD217962002078
Current price is $349.00
Price when purchased online
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