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Oura Ring 4 - Black - Size 6 - Size Before You Buy

  • Based on 6,654 reviews
Condition: New
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$349.00 Why this price?

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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, Mar 25
Order within 13 hours and 11 minutes
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Color: Black


Size: 6


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

Oura Ring 4 Ceramic is a modern expression of our revolutionary smart ring technology, blending refined elegance with everyday durability. The high- performance ceramic exterior is designed to keep up with you. The Ceramic Collection is available in sizes 4-15 and three unique colors: Petal, Tide and Cloud. Each new color is built to accent your style and personality. This colorful new take comes with the same cutting-edge technology of Oura Ring 4. Track over 50 health metrics and get personalized insights into your sleep, activity, readiness, stress, heart health, metabolic health, women's health and more. It is built around a breakthrough sensing technology, Smart Sensing, which adapts to your finger to deliver accurate, continuous data. With 5-8 days of battery life, you'll see a complete picture of your health. It's designed with recessed sensors on the interior, making it comfortable and gentle, even on sensitive skin. Oura Ring is FSA/HSA Eligible — we can accept FSA or HSA funds for the following: Oura Ring, additional chargers, and shipping. Oura Ring 4 Ceramic Polishing Pad: Keep your Oura Ring 4 Ceramic looking like new with the Ceramic Polishing Pad, redeemable once you sync your purchase in the Oura App. Due to the hardness of the zirconia ceramic, it can take on the color of softer metals, like a dumbbell or cookware. Over time, you may notice grey marks on your Oura Ring 4 Ceramic. Rest assured, it's not damaged — it's evidence of a metal transfer and easy to remove with proper cleaning. Use caution when handling metal objects and consider removing your Oura Ring for some activities. The Oura Ring 4 Ceramic Polishing Pad is your partner in keeping your ring in top condition. IMPORTANT: Size yourself with the Oura Ring Sizing Kit before you buy — Oura Rings are not US standard sizing, and finding the right size will result in the best experience possible. With a sizing kit purchase, a credit will automatically be applied to your Oura Ring at checkout.

Operating System: i_os, 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: Ring


Brand: OURA


Model Name: JZ90-54144-06


Style: Metallic


Product Dimensions: 0.94 x 0.94 x 0.28 inches


Item Weight: 6.7 ounces


Item model number: JZ90-54144-06


Batteries: 1 Lithium Polymer batteries required. (included)


OS: i_os, android


Connectivity technologies: Bluetooth


GPS: GPS Via Smartphone


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


Other display features: Wireless


Human Interface Input: Buttons


Color: Black


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


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.

Top Amazon Reviews


  • Worst ever quality with unreliable after sales services
It’s the worst ever product quality and customer service. The battery started to deteriorate after 3 months of normal use. After contacted Oura customer service they have identified the defect on the ring and agreed for a replacement. However, I’ve received shipment info from Oura two times over 1.5 mths time frame but the replacement ring had never shipped out. It’s a complete scandal. ... show more
Reviewed in the United States on April 26, 2025 by maggie niu

  • Contemplating buying another one
Absolutely loved my Oura ring while it lasted. My husband bought this for me for Mother’s Day and I have used it non stop over the past 9 months. It stopped working while I slept and had to be charged twice a day just to get daily stats. I factory reset it. I soft reset it. I tried everything I could to get it working again because it has wonderful features. Still no luck… so I’m contemplating buying another one or switching to a new wearable. ... show more
Reviewed in the United States on January 3, 2026 by jessica j hooper

  • Niche experience, but worth a review.
I know i'm in the minority here, but i wanted to write this review in case others are like me. I am in a wheelchair and cannot walk. I returned the ring because it has no option for being a wheelchair user, rolling instead of walking or any options that account for disability. This is very frustrating as apple watches, other smart watches, and the like, all have options for those that roll through life instead of walk. It was unusable to me because of this. I also found it very uncomfortable, but that's just me. I know I should have checked before purchasing, to see if it accommodated wheelchair use, but I honestly expected it since every other smart tech out there does. Extremely disappointing. In the year 2025, it's very frustrating to have tech like this, that doesn't account for disability at all. ... show more
Reviewed in the United States on January 3, 2025 by Roman

  • Too expensive for short usage
Loved the product when it was working properly. Unfortunately after 8mths it stopped holding charge or tracking my sleep. Honestly might be better to use an Apple Watch then spend the 300 dollars
Reviewed in the United States on July 19, 2025 by Barbara Abaroa Barbara Abaroa

  • Disappointed
So disappointing. Loved it when it worked. Stopped holding charge about 9 months in. Reached out to Oura customer service. Useless. Waste of money.
Reviewed in the United States on January 9, 2026 by jamintrae

  • Health insight
I love this ring for daily tracking of various things. It gives me alot of insight on health and even notifies me when it thinks I'm getting sick. I would rate five stars, but it has given me an allergic reaction on one hand but not the other, unsure why
Reviewed in the United States on June 10, 2025 by Jariely

  • Not working
It’s not working
Reviewed in the United States on July 18, 2025 by ASHAKIR A. ASHAKIR A.

  • Too Small
The ring was too small. I bought it on sale and Amazon cannot exchange it for a bigger size for the same price.
Reviewed in the United States on December 7, 2025 by Rachyl

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