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OURA

Oura Ring 4 - Brushed Silver - Size 12 - Size Before You Buy

  • Based on 6,578 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Mar 25
Order within 13 hours and 40 minutes
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Style: Metallic


Color: Brushed Silver


Size: 12


Features

  • OURA MEMBERSHIP - First month of membership is included with purchase, for new members only. Subscription is 5.99/mo afterwards. Or opt for the annual prepaid option for 69.99. Membership is tied to your account via the Oura App, not your physical ring
  • ACCURACY - SMART SENSING - Oura tracks over 50 health metrics, including sleep, activity, stress, heart health, and womens health metrics. Oura Ring 4 is powered by Smart Sensing, which adapts to you delivering accurate, continuous data, day and night
  • LONG LASTING BATTERY - With up to 8 days of battery life, no screens and no vibrations, Oura Ring 4 allows you to focus on the present. From a workout to a night out youre free to forget its on. Until you start getting compliments
  • HSA/FSA ELIGIBLE - We can accept HSA or FSA funds for the following: Oura Ring, additional chargers, and shipping

Description

Introducing Oura Ring 4: the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most — your health. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn’t just measure your biometrics, it adapts to you, providing insights into over 50 health metrics including sleep, readiness, activity, heart health, stress, metabolic health, and women’s health. Oura Ring quietly and comfortably monitors your health and with 5 to 8 days of battery life — you can forget it’s even on. With multi-ring support, change Oura Ring 4 styles as easily as changing your outfit. If you have two or more Oura Ring 4 styles, you can now switch easily between different finishes in the Oura App.

Operating System: Android


Special Feature: Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight


Connectivity Technology: Bluetooth


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Polymer


GPS: GPS Via Smartphone


Shape: Round


Brand: OURA


Model Name: Oura Ring 4 - Brushed Silver - Size 12 - Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life See more


Style: Metallic


Product Dimensions: 1.02 x 1.02 x 0.31 inches


Item Weight: 6.7 ounces


Item model number: JZ90-54220-12


Batteries: 1 Lithium Polymer batteries required. (included)


Date First Available: October 3, 2024


Manufacturer: Oura


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Mar 25

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Love, Love, Love!!
Style: Metallic Color: Brushed Silver Size: 6
I’ve had the Oura ring for almost a year now and would recommend if you’re looking for a wearable that balances tracking your sleep & recovery while also looking minimal. In the beginning, it took some time getting used to having it on my finger but after a month of wearing it consistently, I barely notice it and really love how simple and sleek it looks. It also charges very quickly, so if battery life is a concern, I’d say there are few moments where I am without it. I was initially drawn to the Oura ring as I didn’t want another screen in my life, and I find that it meets the exact criteria I was looking for. I have heard that its fitness tracking isn’t the most accurate in terms of tracking your calories burned or steps walked, but I don’t really use it so much for those purposes. If fitness tracking is critical, I’d do some more research on all the options available. However, if you’re more concerned about sleep, recovery, and stress metrics, I would say it does a great job at monitoring. ... show more
Reviewed in the United States on December 19, 2025 by Erika
    • Tiny Tech, Big Health Insights
Style: Metallic Color: Brushed Silver Size: 7
Sleek and comfortable to wear, this smart ring delivers highly detailed sleep and health tracking that helps you tune your routines for better rest and recovery.
Reviewed in the United States on February 27, 2026 by bindu abraham
    • Battery goes from 5 days on a charge to less than 1 in a few months
Style: Metallic Color: Brushed Silver Size: 11
Review Image by JoeMomma JoeMomma
I bought my ring on June 23rd 2025. It is now October 9th 2025. I have worn it pretty much every day since I got it. At first it lasted 4-5 days on a charge. Over the past couple of months that has been severely reduced. I now get maybe a day out of it max. If I do not put it on the charger every day, when I go to look at it it is dead. I tried to just put it on the charger every day when I shower, but I guess that's not enough to keep it charged. At this point, this thing is such a chore to keep charged, it i easier to go back to the ways I monitored my sleep and workouts in the past with older technology. I should throw it away, but I paid over $400 for it. I cant sell it because what am I supposed to do, tell people you have to charge it every 20 hours and that in another month you will have to charge it every 10 hours judging by the rate it has lost battery capacity so far. Its not scratched up, hasn't been abused, and I don't work near large magnets or anything. I am a trained technician and this tech item I bought is a sub-par disappointing waste of money. ... show more
Reviewed in the United States on October 9, 2025 by JoeMomma JoeMomma
    • Love my Oura!
Style: Metallic Color: Brushed Silver Size: 11
Love my Oura ring. I’ve had a great experience with it! I tried the ring at Best Buy for selecting a size and the fit was pretty good. Sometimes feel looser than other times, but that’s just fluid fluctuations. It does scratch somewhat easily, but still looks pretty good after 3 months, you just need to be careful. Water resistance and durability are pretty good, taken it to the beach, shower, gym, no issues. Setting up is easy on an iPhone. ... show more
Reviewed in the United States on February 9, 2026 by Renier Velez-cruz
    • Is good ring but it needs better materials.
Style: Metallic Color: Brushed Silver Size: 8
Review Image by A.D A.D
Review Image by A.D A.D
Review Image by A.D A.D
Review Image by A.D A.D
Review Image by A.D A.D
The media could not be loaded. I really enjoy oura ring 4, unfortunately after 7 months of usage, it stopped working. They need better materials for a ring that gets daily usage 24/7. It has one year of factory warranty, so I'm getting new replacement. It was easy process to get new ring from Oura. I recommend buying extra warranty from Amazon because you will want to use this ring 24/7 Take the ring off when you was your hand, wash dishes or go swimming. You can buy protector cover for the ring so it doesn't get scratch so much. ... show more
Reviewed in the United States on September 12, 2025 by A.D A.D
    • A great compliment to collect and collaborate health information gathered by a smartwatch.
Style: Metallic Color: Brushed Silver Size: 11
My husband bought each of us a ring for our birthdays. I was planning to return mine because I have an Apple watch and it seemed redundant. After reading more about the rings features, I decided to use it. It has features that are not available on my watch and gives a more accurate picture of my sleep and activity. It captures apneic events that I was unaware I was having as well as just how little I truly sleep. I have not slept well in more than 13 years, due to spine and shoulder injuries and subsequent surgeries. I never felt my providers believed me that I am unable to sleep for more than 1-2 hrs at a time. I frequently need to get up and walk around, sleep in a recliner or on the floor…. Lack of adequate sleep has taken a toll on my physical and mental wellbeing. Now, I have much more accurate proof of my severity disrupted sleep quality. My watch will record disruptions, but I’m right handed and wear my watch on my left wrist, so it will record me as sleeping because if I’m reading, my left hand is pretty still. This gives a much more accurate picture because I can wear it on may right hand. I think the ring and watch compliment each other in painting a more accurate picture. I would not replace either with just 1 or the other, because some capabilities aren’t available on both. For instance, my watch can detect a hard fall and call 911 if I am unable to confirm that I am ok. Due to spinal nerve damage, I fall frequently and have had some severe injuries, so my watch is vital in that respect. If you are looking for one device that does it all, I am unaware of one. If you are looking for a device to complement and back up the information that is gathered on one device, you cannot go wrong with this ring. I highly recommend a silicone cover for the ring, because it does scratch easily. That being said, my 14 k wedding ring has taken a lot of abuse over the 30 years I’ve worn it, so it could just be that I’m pretty rough on my hands and the loss/decreased (of) sensation in my hands definitely contributes to the scratches. Overall, I really like the features of this ring and that I have a much more accurate picture of how little I sleep, because I’ve always felt that my healthcare providers feel that I have to exaggerate how little I sleep. ... show more
Reviewed in the United States on July 29, 2025 by Not-so-crazy-cat-lady

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