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- Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use are covered from day one. Malfunctions are covered after the manufacturer's warranty. Real experts are available 24/7 to help with set-up, connectivity issues, troubleshooting and much more.
- Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. If we can’t repair it, we’ll send you an Amazon e-gift card for the purchase price of your covered product or replace it.
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Oura Ring 4 - Silver - Size 6 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life
Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
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- Drop off and leave!
Purchase options and add-ons
Operating System | [Proprietary Operating System] |
Special Feature | Heart Rate Monitor, Activity Tracker |
Connectivity Technology | Bluetooth |
Wireless Communication Standard | Bluetooth |
Battery Cell Composition | Lithium Polymer |
GPS | No GPS |
Shape | Round |
Brand | OURA |
Style | Minimalist |
Color | Silver |
About this item
- SIZE BEFORE YOU BUY - Oura Ring 4 sizes are different from standard ring sizes. Size yourself with the Oura Ring 4 Sizing Kit. For additional details, see “From the brand” section below
- 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 30 biometrics, including sleep, activity, stress, heart health, and women’s 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 — you’re free to forget it’s on. Until you start getting compliments
- DESIGNED FOR 24/7 WEAR - The updated design of the Oura Ring 4 is more comfortable, fits better than ever, and is water resistant. 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, Oura Ring Chargers
- LOOKING FOR THE BEST HEALTH TRACKER? - Whether you’re searching for a sleep ring or fitness ring, Oura Ring 4 is for you — this revolutionary smart ring that allows you to discreetly track your sleep, activity, recovery and stress — in style
Frequently bought together

Customers also search
From the manufacturer

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Size before you buy
The Oura Ring 4 Sizing Kit is the best way to ensure an accurate experience. With a purchase of the sizing kit, you'll receive a $10 Amazon credit towards your Oura Ring 4.
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Easy to wear, everywhere
Sleek and comfortable, Oura Ring seamlessly fits into your life from a workout to a night out.
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No interruptions
Stay present without notifications on your wrist. Check the Oura App when you want to.
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Built to last
Oura Ring 4 is fully titanium: one of the strongest metals on earth. Durable, lightweight, water resistant.
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Accurate by design
Oura Ring 4 delivers incredibly accurate data and personalized health insights to help you be at your best.

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Sleep
Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel.
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Activity
Whether you're running a marathon or running errands, Oura tracks your daily activity and workouts while helping you strike a balance between movement and recovery.
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Readiness
Know when to push it and when to take it easy. Your Readiness Score tells you how energized you are using over 30 biometrics — it can even tell when you might be getting sick.
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Stress
Oura will help you identify signs of stress and understand how well your body handles it. You'll know when you need to incorporate more self-care practices and how to recover from long term stressors.
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Heart Health
From monitoring your daily heart rate and HRV to discovering your Cardiovascular Age and Cardio Capacity, Oura helps you take care of one of the key indicators of your overall health — your heart.
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Women’s Health
Your cycle impacts your mood, sleep, activity and more, every day. Oura helps you understand how your cycle affects your body, so you can make better, informed decisions about your holistic health.
Size Before You Buy

Step 1:
Purchase an Oura Ring 4 Sizing Kit and receive a $10 Amazon credit towards your Oura Ring 4.

Step 2:
Purchase your Oura Ring 4, the $10 credit will be automatically applied at checkout.

Step 3:
Slip on your Oura Ring 4 and download the Oura App.

Step 4:
New members get the first month of Oura Membership free, then it’s $5.99 per month.
What's in the Box

Oura Ring 4

Oura Ring 4 Charger and USB-C Cable
Videos
Videos for this product
2:58
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My review of the Oura ring & sizing kitMomma’s Favorite Finds 🌻
Videos for this product
1:13
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Which Finger to Choose | Oura Ring 4Creative Home Reviews
Videos for this product
3:57
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Honest Review of Oura Ring Gen 4 and Sizing Kit!Gillian McTague
Videos for this product
2:09
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What you should know BEFORE buying Oura ring✅✨Rech-ommendations
Videos for this product
4:42
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HONEST thoughts on the Oura Ring 4!Lisa's Reviews and Recs ✨
What's in the box
Product information
Product Dimensions | 0.94 x 0.94 x 0.28 inches |
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Item Weight | 6.4 ounces |
ASIN | B0D9WW3YND |
Item model number | JZ90-54217-06 |
Batteries | 1 Lithium Polymer batteries required. (included) |
Customer Reviews |
4.3 out of 5 stars |
Best Sellers Rank | #5,392 in Electronics (See Top 100 in Electronics) #18 in Smart Rings |
OS | [Proprietary Operating System] |
Connectivity technologies | Bluetooth |
GPS | No GPS |
Special features | Heart Rate Monitor, Activity Tracker |
Other display features | Wireless |
Human Interface Input | Buttons |
Color | Silver |
Whats in the box | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
Manufacturer | Oura |
Country of Origin | Estonia |
Date First Available | October 3, 2024 |
Warranty & Support
Feedback

Oura Ring 4 - Silver - Size 6 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life
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Product 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 30 biometrics including sleep, readiness, activity, heart health, stress, and women’s health. Oura Ring 4 quietly and comfortably monitors your health and with up to 8 days of battery life — you can forget it’s even on. Sleeker, smarter and more accurate than ever, Oura Ring 4 is made for you. Oura Ring 4 is HSA/FSA ELIGIBLE - We can accept HSA or FSA funds for the following: Oura Ring, Oura Ring Chargers. IMPORTANT: Size yourself with the Oura Ring 4 Sizing Kit before you buy — Oura Ring 4 is not US standard sizing, and finding the right size will result in the best experience possible. With an Oura Ring 4 sizing kit purchase, a 10 credit will automatically be applied to your Oura Ring 4 at checkout.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the Oura Ring comfortable and appreciate its health tracking features, particularly its ability to monitor heart rate and sleep parameters. The ring receives positive feedback for its quality, with some customers noting it performs better than the Apple Watch. However, the sizing and battery life receive mixed reviews - while some find it perfect for sizing, others note the sizes don't match standard ring sizing, and while some report it lasts about 6 days, others say it only lasts 3-4 days. Moreover, opinions on value for money are divided, with some finding it worth the cost while others consider it overpriced.
AI-generated from the text of customer reviews
Customers appreciate the ring's sleep tracking features, which provide insights into sleep habits and activity levels, with one customer noting its accurate monitoring of heart rate and sleep parameters.
"...fitness "events" and I love that when opening the app, there's a backlog of events that you have to confirm the type of activity...." Read more
"...It’s increased my understanding of sleep, the importance of exercise for sleep, and dare I say, made me a better person...." Read more
"...The sleep tracking is fantastic! It's been incredibly insightful to see our sleep patterns and get data on our heart rate and activity levels...." Read more
"...Next, the Sleep function, even with learning curve, seemed to function out of the box, HOWEVER, after the first recharge of the Ring 4, there was an..." Read more
Customers appreciate the health tracking features of the ring, which provides comprehensive health information and allows monitoring of sleep, stress, and maximum heart rate throughout the day.
"...However, the ring really is good at spotting fitness "events" and I love that when opening the app, there's a backlog of events that you have to..." Read more
"...I’ve already recommended it to several people because it’s been that impactful. If you’re on the fence about it, just go for it—you won’t regret it!" Read more
"...science will like this, you can literally experiment and see the exact results for yourself. Accuracy: I would say this is 95% accurate...." Read more
"...While the data it provides is valuable, I wish they would offer a one-time purchase option or a more affordable subscription plan...." Read more
Customers find the Oura Ring to be fantastic and amazing, with one customer describing it as a perfectly lovely wellness ring.
"...It’s an incredible device that gives me real insight into how I’m feeling, what’s going on with my body, and even why certain things might be..." Read more
"...If you’ve never had an Oura ring: this product is amazing. So comfortable, more so than a watch...." Read more
"I love my Oura ring! Glad I went with the Gen 4 for the sleeker, more compact design...." Read more
"...It helps me track my sleep and activity much better than my Apple Watch. It was super easy to set up and the app is very good...." Read more
Customers find the Oura Ring comfortable to wear, with one customer noting it feels like you're not wearing it at all.
"...One month later, I am glad I went with the smaller size. No discomfort and still using water in the morning to take off the ring before I..." Read more
"...Conclusion: I love the Oura ring. It’s more comfortable than an Apple Watch or a woop in my experience. Way, WAY more comfortable...." Read more
"...The ring itself is sleek and comfortable to wear, and the battery life is truly impressive – lasting nearly a week...." Read more
"...From being able to comfortably sell wearing my Oura ring, to giving me valid, easy to understand health information and advice, I have been very..." Read more
Customers have mixed experiences with the ring's functionality, with some finding it very useful and noting it works well with the watch, while others report that it only worked for 3 weeks or stopped working altogether.
"...simply encouraging me to be more active, which has lead to a good impact on my health. Overall, pretty satisfied with the ring...." Read more
"...If not for #2, I might have tried to fix #1, but the time isn't worth it...." Read more
"...on things before I’m consciously aware of them, which helps me get ahead of potential issues or make adjustments to my activity, sleep, or habits...." Read more
"...far, far lower cost AND the same updates, assessments, insights and suggestions BUT with NO subscription fee...." Read more
Customers have mixed experiences with the sizing kit, with some finding it perfect for their index finger while others report it being much larger than anticipated.
"...Comfort-wise, it’s spot on. It’s the exact same size as my old ring, so it doesn’t feel any different even though they recommend wearing it on your..." Read more
"I like the ring but my ring size is too big and the website is unclear on how to exchange the size." Read more
"...The new size is great for me. My old ring was snug on my ring finger...." Read more
"...size 10 that I expected for the middle finger was a perfect fit for the Index finger, which is normally a traditional 9... so there is some..." Read more
Customers have mixed experiences with the ring's battery life, with some reporting it lasts up to 6 days and can be worn for a week straight without charging, while others find it only lasts 3-4 days.
"...One of the standout features for me is the battery life. It lasts several days—almost a week—which is impressive for how much data it’s tracking...." Read more
"...Edit: a little disappointed the battery lasts 4-5 days not 8 like they claim" Read more
"...The ring itself is sleek and comfortable to wear, and the battery life is truly impressive – lasting nearly a week...." Read more
"...Also, my watch started acting up around the same time, crashing during my run. This alone is a deal breaker. #..." Read more
Customers have mixed opinions about the ring's value for money, with some finding it worth the cost while others feel it's not worth the price tag, particularly due to ongoing subscription costs.
"...expensive, adding a monthly subscription feels unnecessary and a bit greedy...." Read more
"...Definitely worth every penny!" Read more
"...While understandable, it makes it impossible to fully assess the personal value and utility of the Ring 4 in the 30-day period for returns...." Read more
"...Battery lasts 6 days and love the app. the only negative is the monthly charge but I can use my HSA to reimburse me...." Read more
Reviews with images

Good but bulky.
Top reviews from the United States
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- Reviewed in the United States on February 19, 2025Color: StealthSize: 9Verified PurchaseI've been wearing the oura ring gen 4, stealth, size 9 for exactly one month now.
First off, sizing.
I was between sizes 9 and 10. I opted for the smaller size using this little test: Using the plastic ring sizes, if you cannot take off the ring in the morning when your fingers are puffiest, and the only way to do so is by wetting your finger to add some slippage, then that's the right size. With the bigger size, I was able to take off the ring in the morning without using water so I felt that size was too big. One month later, I am glad I went with the smaller size. No discomfort and still using water in the morning to take off the ring before I shower.
Comfort
I wear it on my right index finger. I did not like in between fingers, which is the reason I wear a silicone wedding band. But overall, it's not very intrusive. It's annoying to write with a pen or pencil but that's not often.
Appearance
I love the stealth color. Already got a few scratches on my palm side, which is a little annoying. But I tell myself that at least the back of my hand, the ring looks like new. I use these silicone protectors when working out with weight and it does a great job. The scratches came from handling things where I should have taken off my ring. I wish there were some way to make the scratches less visible as these scratches you see a shiny silver metal which contrasts a lot!
Battery
No issues. I charge it every few days or so while I shower. I am manually trying to keep the battery at between 25% and 75% but most often I forget that I left it charging and it goes back to 100%.
Sleep Tracking
I'm not a power user. I enjoy checking in the morning my sleep score and compare it to how I thought my sleep went the night prior. Pretty accurate sleep tracking in my opinion.
Fitness Tracking.
So we all know that the step counter is way off so I don't really care about that. However, the ring really is good at spotting fitness "events" and I love that when opening the app, there's a backlog of events that you have to confirm the type of activity. My top three are: housework, walking, and HIIT. The app gets better at recognizing the events so most times I am just confirming instead of categorizing. Overall, this level of tracking is simply encouraging me to be more active, which has lead to a good impact on my health.
Overall, pretty satisfied with the ring. Glad I got it.
- Reviewed in the United States on March 28, 2025Color: SilverSize: 9Verified PurchaseThe Oura Ring has easily become one of my top purchases—not just of this year, but honestly, of all time. It’s an incredible device that gives me real insight into how I’m feeling, what’s going on with my body, and even why certain things might be happening. Sometimes it even picks up on things before I’m consciously aware of them, which helps me get ahead of potential issues or make adjustments to my activity, sleep, or habits. It’s made a real difference in how I approach my day-to-day life and helped me make better decisions for my health and well-being.
One of the standout features for me is the battery life. It lasts several days—almost a week—which is impressive for how much data it’s tracking. I also love that it’s not pushy with recommendations like some other health apps or gadgets. It’s more like having a helpful guide that you can check in with as you choose, rather than something that’s constantly nagging you to change your routine.
Comfort-wise, it’s spot on. It’s the exact same size as my old ring, so it doesn’t feel any different even though they recommend wearing it on your index or middle finger. I’ve been wearing it on my ring finger without any issues—my readings are great, and it’s held up perfectly. It’s durable, waterproof, and just feels like a natural part of my routine now.
I’ve already recommended it to several people because it’s been that impactful. If you’re on the fence about it, just go for it—you won’t regret it!
- Reviewed in the United States on March 18, 2025Color: BlackSize: 7Verified PurchaseI’ve been supporting Oura since it was a kickstarter. I had the version 3 and decided not to upgrade but since my spouse lost her ver 3 I gave her mine and ordered this.
If you’ve never had an Oura ring: this product is amazing. So comfortable, more so than a watch. The app is great, I’ve learned so much about sleep habits, what to do and not to do for sleep. Lovers of science will like this, you can literally experiment and see the exact results for yourself.
Accuracy: I would say this is 95% accurate. Again, I’ve been using this for about 5 years. So I’ve seen the accuracy improve IMMENSELY over the years. Version 4 is the best yet. Better than any other sleep tracker I’ve tried and I’ve tried a lot. The biggest inaccuracy is every now and then I’ll get up to pee in the middle of the night and it will think I woke up for the day. Sometimes it knows I just went to pee sometimes not. Since I noticed it, I take my ring off if I get up to go to the toilet and it fixes the issue—just don’t forget to put it back on!
Key info for consumers: the fit is slightly larger than the version 3. To be exact I would say the version 4 is about half a size larger. So the new size 7 for example, would be a size 7.5 on the old version 3 and older models.
The new size is great for me. My old ring was snug on my ring finger. So now I can wear the new one on my pointer finger and even middle finger depending on how hot it is. It all depends on the temperature outside due to our hands expanding/shrinking in heat/cold. Hot days I’ll wear on my ring finger, cold days I can wear on my index or middle finger.
Conclusion: I love the Oura ring. It’s more comfortable than an Apple Watch or a woop in my experience. Way, WAY more comfortable. It’s also very accurate and the info is extremely useful. It’s increased my understanding of sleep, the importance of exercise for sleep, and dare I say, made me a better person. Getting better sleep takes effort, and this is merely a tool to help you do that. Getting better sleep can 100% make you a better person and I speak from my own experience.
Top reviews from other countries
- Felix SngReviewed in Singapore on March 1, 2025
1.0 out of 5 stars Oura Ring cannot be delivered to some locations.
Color: Sizing KitSize: Sizing KitVerified PurchaseGreat sizing tool. However, Amazon SG doesnt allow the actual Oura Ring to be delivered. The status has been “Ordered Received…”
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CarlitaReviewed in France on April 24, 2025
1.0 out of 5 stars Abonnement obligatoire !!
Color: SilverSize: 9Verified PurchaseTrop chère en plus abonnement obligatoire
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Flavio LópezReviewed in Mexico on December 22, 2024
5.0 out of 5 stars Es un excelente producto
Color: BlackSize: 9Verified PurchaseAdemás del servicio y puntualidad de entrega, es un producto extraordinario, gran herramienta para conocernos
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Kindle CustomerReviewed in Mexico on December 11, 2024
5.0 out of 5 stars Satisfecha con el producto
Color: Sizing KitSize: Sizing KitVerified PurchaseSatisfecha con el producto
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Jean-MichelReviewed in Germany on April 18, 2025
5.0 out of 5 stars Perfekte Möglichkeit Schlaf zu analysieren
Color: StealthSize: 10Verified PurchaseWürde ich noch mal kaufen