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OURA

Oura Ring 4 Ceramic Tide - Size 15 - Size Before You Buy

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Mar 9
Order within 11 hours and 54 seconds
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Style: Ceramic


Color: Tide


Size: 15


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.

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


Style: Ceramic


Color: Tide


Target Audience: Unisex Adults


Package Dimensions: 4.57 x 4.49 x 1.26 inches


Item Weight: 8.1 ounces


Item model number: JZ90-57461-15


Batteries: 1 Lithium Polymer batteries required. (included)


Date First Available: October 1, 2025


Manufacturer: Oura


Item Weight: 0.23 Kilograms


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Mar 9

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.

Similar Products

Top Amazon Reviews

    • Beautiful design with genuinely useful health insights
Style: Ceramic Color: Tide Size: 10
I bought the Oura Ring 4 Ceramic (Tide) for my wife and she absolutely loves it. The ceramic finish looks clean and elegant — it doesn’t feel like a bulky piece of tech, just a really nice ring she actually wants to wear every day. Beyond the look, she’s been finding the health insights genuinely useful, especially the sleep and recovery tracking. It’s given her a better understanding of how well she’s actually resting and how that impacts her day. The app is straightforward and easy to interpret, which makes it more practical than overwhelming. Overall, it’s been a great combination of style and function. Definitely a win. ... show more
Reviewed in the United States on February 24, 2026 by E. Spofford
    • Love it!
Style: Ceramic Color: Tide Size: 5
I love this ring! I ordered the color Tide & its gorgeous! It is a little more bulky than a typical ring but I expected that & its not umcomfortable. I found it very easy to set up. They say to size down if in-between sizes but in my opinion, they run small & you should size up. I notmally wear a 4.5 & I ordered a 5 which is more than snug. Had I ordered a 4, I wouldn’t be able to get the ring off! I also suggest ordering some ring covers to protect the ring & change up the color if you want. ... show more
Reviewed in the United States on February 8, 2026 by Melissa McCammon
    • The Best Oura Ring Yet!
Style: Ceramic Color: Tide Size: 10
Review Image by Blksquirrel419 Blksquirrel419
This is my third Aura ring. I purchased the first in 2021. Oura gets better and better, but the Gen 4 ceramic is by far my favorite! It’s light weight and more comfortable than my titanium Gen 3. I love that they did away with the nubs inside the ring. I did go down a size in the Gen 4, so be sure to order the new sizing kit! The ring’s ceramic finish is very glossy and clean looking. The pale blue compliments my brown skin and my aquamarine wedding ring. ... show more
Reviewed in the United States on November 21, 2025 by Blksquirrel419 Blksquirrel419
    • Oura Ring
Style: Ceramic Color: Tide Size: 10
Review Image by Nina Nina
Review Image by Nina Nina
I really liked it; it’s elegant and the colors are beautiful. However, I was disappointed because I didn’t receive the cleaning cloth. It tends to leave some marks (darker areas) , and I’m not sure how to clean it properly. My reason for giving 4 stars is only because of this.
Reviewed in the United States on January 31, 2026 by Nina Nina
    • No Exchanges - Do Not Use FSA to Purchase
Style: Ceramic Color: Tide Size: 9
The ring itself is 5 stars. This is just a warning to anyone using FSA to purchase on amazon rather than directly from Oura or another retailer. Amazon is the only one that will not allow an exchange . You need to return it , then re purchase. This is fine if you’re not into the next year and any refund will go back to your previous years funds. So a total loss. I spent 4 hours getting useless support to finally get an answer. I was lied to by support and told my return would go onto a gift card so I can re purchase only to see in the return being issued back to the original payment I’m not trying to scam I legitimately want the ring, just in the correct size. Oura will not hep you unless you purchase through them on their website, not their amazon store. 100% will only make larger purchases from a store I can walk into or a place that will allow an exchange. Yes we both tried the ring sizer for Oura for the correct model. My husband was still a size off It definitely has a different feel than the plastic sizers. ... show more
Reviewed in the United States on January 24, 2026 by Amazon Customer
    • The perfect smart ring!
Style: Ceramic Color: Tide Size: 8
Review Image by Marina Marina
Review Image by Marina Marina
Review Image by Marina Marina
I love the quality its just like a normal ring and fits perfectly. Its not only waterproof but the durability is perfect to wear all day while doing multiple activities. Proven functionality and it tracks your movements and health status continuously. You will need the sizing kit to get that perfect fit but it fits just like a standard ring would and its super smooth to wear all day. ... show more
Reviewed in the United States on October 22, 2025 by Marina Marina
    • Good product
Style: Ceramic Color: Tide Size: 8
Works great, it’s been really interesting and insightful tracking my stress
Reviewed in the United States on December 10, 2025 by Christina
    • Scratches so easily
Style: Ceramic Color: Tide Size: 9
I had the rose gold ring for 2.5 days and it’s already so scratched up. It lost its beauty/luster in less than a week. It hasn’t touched metal and my daily activities are mild so I’m very disappointed in the quality. It’s going back to the company tomorrow. It definitely won’t last a year or even a month if it can’t last 3 days. The data was nice to start seeing but I can’t spend $500 plus membership fees on something I won’t even want to wear. I’d recommend sizing down if you just want to see for yourself as the plastic sizers are not the same as the actual ring. I’d consider purchasing again when the quality of the outer shell improves. ... show more
Reviewed in the United States on March 3, 2026 by Craig and Jess

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