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OURA

Oura Ring 4 - Silver - Size 9 - Smart Ring - Unique Sizing, Not Standard US Ring Sizes - Size First - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life

  • Based on 5,284 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Sep 21
Order within 3 hours and 51 minutes
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Color: Silver


Size: 9


Features

  • 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 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
  • 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 youre 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

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, metabolic health 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 FSA/HSA Eligible — we can accept FSA or HSA funds for the following: Oura Ring 4, additional chargers, and shipping. 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 credit will automatically be applied to your Oura Ring 4 at checkout.

Special Feature: Heart Rate Monitor, Activity Tracker


Battery Capacity: 22 Milliamp Hours


Connectivity Technology: Bluetooth


Wireless Communication Standard: Bluetooth


Battery Cell Composition: Lithium Polymer


GPS: No GPS


Shape: ring


Brand: OURA


Model Name: Oura Ring 4


Style: Modern


Product Dimensions: 1.02 x 1.02 x 0.28 inches


Item Weight: 6.4 ounces


Item model number: JZ90-54217-09


Batteries: 1 Lithium Polymer batteries required. (included)


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


Date First Available: October 3, 2024


Ram Memory Installed Size: 512 KB


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Sep 21

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
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  • 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

    • I love my Rose Gold Oura!
Color: Rose Gold Size: 8
Review Image by Abbie Abbie
I know the Oura Ring comes at a steep price but I truly think it is worth it. I have had it since February and I only ever take it off to charge it. The biggest con is that the rose gold coating has a few chips on the outer edges and I have scratched it up pretty good. I have put this ring through a lot though so I’m not that surprised. You can buy clear silicone “cases” for it but it dulled out the brightness of the color itself. I still get compliments on how pretty it is even though I have been rough with it. The first week wearing it was an adjustment. At first it felt heavy and bulky but after the second week I stopped noticing it. I got a size 8 and it’s the perfect fit and feels comfortable. It doesn’t ever slip off but it’s easy to remove. My main reason for getting the Oura Ring was to help me keep track of my cycles and ovulation. I love the app and everything it has to offer. Overall the quality is great and I recommend this ring to all of my family and friends. ... show more
Reviewed in the United States on September 8, 2025 by Abbie Abbie
    • Oura Ring 4 - Silver ⭐⭐⭐⭐⭐ 5 out of 5
Color: Silver Size: 7
I’m an Apple user, and the Oura Ring 4 has been the perfect addition to my setup. The design is sleek and comfortable — I barely notice I’m wearing it. What really makes it stand out, though, is how well it tracks sleep and overall recovery. The insights on sleep quality, readiness, and activity have helped me better understand my rest and how it connects to my daily strength and energy. The data feels accurate, and the app is clean and easy to use, syncing smoothly with my phone. If you’re already into health tracking, this is a fantastic companion to the Apple ecosystem. For me, it’s been a game-changer in monitoring my sleep and keeping a closer eye on my recovery. ... show more
Reviewed in the United States on August 26, 2025 by 3D Universe
    • QURA Ring
Color: Silver Size: 13
The Oura Ring looks sharp and feels solid. The health tracking and long-term trend data have been extremely helpful — especially for sleep, recovery, and overall wellness. One of the biggest perks for me is that I can still wear my regular watches while keeping fitness and health stats monitored throughout the day. That said, sizing was a real hassle at first. I used their printable sizing chart and landed on a size 10, but it ended up being too tight. Even after having my finger professionally measured at a jewelry store (they said I was a 10.5), sizes 10, 11, and even 12 didn’t fit comfortably. Eventually, I ordered Oura’s $10 sizing kit — and it turns out I needed a 13. Once I got the correct size, the ring was perfect. Bottom line: I highly recommend the Oura Ring for anyone looking for subtle, reliable health tracking — but do yourself a favor and order the sizing kit upfront. It’ll save you the hassle of multiple returns. ... show more
Reviewed in the United States on July 19, 2025 by Jennifer Heston
    • Amazing data collection… but a very steep price and short life.
Color: Silver Size: 12
Review Image by Josh A. Josh A.
Review Image by Josh A. Josh A.
Review Image by Josh A. Josh A.
Review Image by Josh A. Josh A.
Review Image by Josh A. Josh A.
Review Image by Josh A. Josh A.
Review Image by Josh A. Josh A.
Note: This is a long term review, after owning the ring for 10 months. It disappoints me to have to give this a 1 star review, because when the ring works, it works. It’s very convenient, accurate, un-intrusive to wear, and gives you a ton of valuable data, especially related to your cardiovascular system. But, out of the blue about 10 months into my ownership, battery life has cratered, and even when it doesn’t run fully discharged, it has randomly started disconnecting, meaning it’s not harvesting the data that I expect and want it to, and even worse, without full days of data, it won’t build any trends, meaning the limited data it does collect is useless. Reading online it seems I am not the only person experiencing this disappointment. Oura’s customer service is non existent. I have yet to figure out how to get in contact with a human there. All their customer service is routed through “Finn” their AI assistant. After trying everything that “Finn” has recommended numerous times, and getting nowhere, it would be an understatement to say I am frustrated. One of “Finn’s” suggestions is to fully wipe the ring and app from your phone and reinstall it, and if that doesn’t work, the implication from the system is that it will then elevate it to a customer service rep. The issue with that is when you do that, a hard reset and reinstall, the record with “Finn” also seems to go with it, so the system will never engage a human, it comes across almost like it’s intentional firewall in their service. I am coming up on my 1 year membership renewal. I am at the point where I need to decide if I need to make the $72 annual investment again. I would gladly spend that again, but I’m not really looking at a $72 investment. Given my current ring performance, this means buying another ring. Between the membership and a new ring, with taxes, shipping, etc, etc, etc that’s a near $500 investment; and since it only made it 10 months, that really means it’s effectively closer to $600 a year. Battery powered wearables have a limited life; I went into this understanding that, but, I don’t think that after less than a year of usage, going from ~5 days of battery life and collecting non-stop data to less than 24 hours of life with random crashes is in any way acceptable. Apple or Garmin or Google would have mass recalls or replacements on their hands if their wearables behaved like this. Good health is priceless. The ring helped me tremendously in my fitness journey. I have lost over 65 lbs with its help. At this point, however, given I have hit and am maintaining my weight goal, and from my current experience as well as based on what I read from others online, I refuse to spend any more money with Oura, simply because of their poor customer service and poor product life. My final thoughts: the ring makes your fitness journey significantly easier. Data is king when you’re committed to self improvement. For that, I give it 5 stars; but if you buy one, understand that it most likely will not make it to a year without some sort of collection or battery issue. You have to decide for yourself if $500 for 10-ish months of data is a fair price to pay. ... show more
Reviewed in the United States on September 13, 2025 by Josh A. Josh A.

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