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I’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.
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Frequently bought together
This item: Oura Ring 4 - Gold - Size 8 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life
$499.00
Get it as soon as Thursday, Apr 3
In Stock
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$17.95
Get it as soon as Thursday, Apr 3
In Stock
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$9.99
Get it as soon as Thursday, Apr 3
In Stock
Total price: $00
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Sustainability features
This product has sustainability features recognized by trusted certifications.Made with chemicals safer for human health and the environment.As certified by
OEKO-TEX MADE IN GREEN
Made in Green by Oeko-Tex verifies that the article has been manufactured using processes with a reduced environmental impact and under socially responsible working conditions. The label also verifies that the product has been tested for substances that could harm the body and environment. Thanks to the unique product ID, each product can be easily traced by entering the certification number on the Label Check on the Made in Green website, where more information about the production facilities is provided.Certification NumberM1KN8XW04Sustainability features
This product has sustainability features recognized by trusted certifications.Made with chemicals safer for human health and the environment.As certified by
Global Recycled Standard
Products certified to the Global Recycled Standard (GRS) contain recycled content that has been independently verified at each stage of the supply chain, from the source to the final product. In addition, social, environmental, and chemical criteria related to processing are required. The purchase of Global Recycled Standard (GRS) certified products demonstrates demand for recycled content and best processing practices in the supply chain.Certification BodyGSCSCertification NumberTE-00133392Sustainability features
This product has sustainability features recognized by trusted certifications.Made with chemicals safer for human health and the environment.As certified by
Global Organic Textile Standard
Global Organic Textile Standard (GOTS) is a global certification with strict standards for the processing of clothing and home materials made with organic fiber. Only textile products that contain a minimum of 70% organic fibers can become GOTS certified. These fibers are made with no GMOs, no highly hazardous chemicals, and no child labor. Producers must also have a strong system to protect the health, safety, and rights of their employees and have strict wastewater treatment practices.Certification LevelCONTAINS 95-100% ORGANIC CONTENTCertification BodyOregon TilthCertification NumberOT-033770Sustainability features
This product has sustainability features recognized by trusted certifications.Carbon emissions from the lifecycle of this product were measured, reduced and offset.As certified by
Carbonfree Certified
Each Carbonfree Certified product goes through a cradle-to-grave assessment to determine the product’s carbon footprint. The carbon emissions associated with the product are reduced where possible, and remaining carbon emissions are offset with third-party verified carbon reduction projects in renewable energy, energy efficiency and forestry.Sustainability features
This product has sustainability features recognized by trusted certifications.Made with chemicals safer for human health and the environment.As certified byOEKO-TEX MADE IN GREEN
Made in Green by Oeko-Tex verifies that the article has been manufactured using processes with a reduced environmental impact and under socially responsible working conditions. The label also verifies that the product has been tested for substances that could harm the body and environment. Thanks to the unique product ID, each product can be easily traced by entering the certification number on the Label Check on the Made in Green website, where more information about the production facilities is provided.Certification NumberM1KN8XW04Sustainability features
This product has sustainability features recognized by trusted certifications.Made with chemicals safer for human health and the environment.As certified by
OEKO-TEX STANDARD 100
STANDARD 100 by OEKO-TEX requires every component of a textiles product—including all thread, buttons, and trims—to be tested against a list of more than 1,000 harmful regulated and unregulated chemicals which may be harmful to human health. The assessment process is globally standardized, independently conducted, and updated at least once a year based on new scientific information or regulatory requirements. Certification focus: #ProductSafety and #ChemicalsUsed.Certification Number23.HCN.80986
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
Compare with similar items
This Item  Oura Ring 4 - Gold - Size 8 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life | Recommendations  |  |  | |
| Price | $499.00 | -26% $199.99 List: $269.99 | $1.00 | $99.99 |
| Delivery | Get it as soon as Thursday, Apr 3 | Get it as soon as Thursday, Apr 3 | Get it as soon as Friday, Apr 4 | Get it Apr 8 - 16 |
| Customer Ratings | ||||
| Sold By | Amazon.com | Seekzero Official | Ultrahuman US | CORAILO |
| size | 8 | 10 | Sizing Kit | 12-67.2mm/2.65" |
| operating system | — | Android&iOS | Ultrahuman App | Android Wear 1.0, IOS |
| connectivity tech | Bluetooth | Bluetooth | Bluetooth | Bluetooth |
| supported applications | Fitness Tracker | — | Sleep Monitor, Heart Rate Monitor, Activity Tracker, Custom Activity Tracker, Multisport Tracker | Fitness Tracker, Sleep Monitor |
| input interface | buttons | buttons | buttons | touch screen |
| wireless standard | bluetooth | bluetooth | bluetooth | bluetooth |
| water resistance | water resistant | water resistant | water resistant | waterproof |
| case material | Titanium | — | Titanium | Titanium Steel Alloy |
| gps navigation | — | GPS Via Smartphone | No GPSx8 | GPS Via Smartphone |
| band color | gold | — | black | Black |
| band material | Gold | — | titanium | Metal |
Worked Great To Find My Oura Ring Size! Discount Was Automatically Applied To The Ring.
I was hesitant to buy this because I worried it would be complicated to apply the discount from buying the sizing kit to the ring, but it was completely automatic (I bought both through Amazon so I can't say it is the same anywhere else, but on Amazon it was automatically applied to my checkout)! I didn't have to do anything.The sizing kit works great! It came in a box with several different sizes from very small to very large (size 4 - size 15). The size you are wearing is on each band so you won't forget which size you are wearing. The size number raises up, as part of the same material of the ring, meaning it cannot fade off, and you will always know which size each ring is.I found the most comfortable fit and wore it for a few days to make sure it was snug but not uncomfortable. The ideal fingers for the Oura ring are the pointer, middle, or ring finger. If you are prone to swelling you could size it to your ring or pointer and if you have swelling, move it to your middle finger.It is good to buy the kit to be sure, but I will say that the size I bought is also my ring size. I am still happy I bought the sizing kit and didn't risk having to do a return if it were different (and it can be), and it didn't cost me anything once I bought the ring.If you know you want the Oura ring, don't hesitate to buy the kit, as you will get your money back when you buy the ring, and it will save you the hassle of a return.My daughter ended up taking the smaller rings and decorating them, so we got some use out of the extra rings, as well!
Top reviews from the United States
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- Reviewed in the United States on March 23, 2025Color: SilverSize: 7Verified Purchase
I recently purchased the Oura Ring 4 in silver (size 6), both for myself and my wife, and overall, we're really impressed. 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. The ring itself is sleek and comfortable to wear, and the battery life is truly impressive – lasting nearly a week.
Great Sleep Tracking, Annoying Subscription
Reviewed in the United States on March 23, 2025
However, there's one major downside: the subscription fee. For a device that's already quite expensive, adding a monthly subscription feels unnecessary and a bit greedy. While the data it provides is valuable, I wish they would offer a one-time purchase option or a more affordable subscription plan.
Despite the subscription issue, the Oura Ring 4 is a great device for tracking sleep and general wellness. 1 If you can stomach the ongoing cost, it's definitely worth considering.
Images in this review
Top reviews from other countries
- Felix SngReviewed in Singapore on March 1, 2025
Oura Ring cannot be delivered to some locations.
Color: Sizing KitSize: Sizing KitVerified Purchase -
Flavio LópezReviewed in Mexico on December 22, 2024
Es un excelente producto
Color: BlackSize: 9Verified Purchase -
Kindle CustomerReviewed in Mexico on December 11, 2024
Satisfecha con el producto
Color: Sizing KitSize: Sizing KitVerified Purchase -
PamelaReviewed in Mexico on November 20, 2024
Usado
Color: BlackSize: 7Verified Purchase
La caja venía abierta y el cargador también, se ve que ya se había usado.PamelaUsado
Reviewed in Mexico on November 20, 2024
Images in this review
- BynoemReviewed in Germany on March 26, 2025
New and improved
Color: StealthSize: 11Verified Purchase
