The Oura Ring 4 Ceramic Tide is Oura’s smart ring in a zirconia ceramic shell, in the colour Oura describes as a light, pastel blue-green, fresh and unique. This one is US size 8. Inside the ceramic is a seamless titanium band carrying the sensors that track sleep stages, heart rate, heart rate variability, blood oxygen at night, temperature trends and activity, with the results shown in the Oura app on iOS and Android. Oura rates the battery at 5 to 8 days, depending on ring size, settings and use.
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The Tide colour in real life
Tide is the most unusual of the four ceramic finishes Oura makes (Midnight, Cloud, Tide and Petal). Oura calls it a light, pastel blue-green, and on the hand the Oura Ring 4 Ceramic Tide reads somewhere between mint and sea glass: soft enough to sit next to a wedding band or a watch, but clearly a colour rather than a metal. Because ceramic is fired and polished, the surface has a smooth, glossy lustre, so Tide catches the light differently from the brushed or polished titanium versions of Oura Ring 4. It looks fresh with white, navy, denim and beige clothing, and it suits people who want a wearable that looks like jewellery.
Who the Oura Ring 4 Ceramic Tide suits
The Oura Ring 4 Ceramic Tide suits someone who wants health tracking without a watch on the wrist, and who would rather wear something with a bit of personality than a plain black or silver band. It works well for people who already wear coloured accessories, for gifts where the ring should feel personal, and for anyone who sleeps badly with a watch on. If you prefer something that disappears on the hand, Cloud or Midnight are quieter choices; if you want the warmest tone, look at Petal. Tide sits in between: noticeable, but calm.
Ceramic care and everyday wear
Oura chose zirconia ceramic for its scratch resistance, lustre and colour, and each ring is fired to strengthen the material. Oura is also clear about its limits: minor scratches from regular wear are normal, and because the ceramic is hard, it can scuff and pick up colour from softer metals such as a dumbbell or kettlebell handle. On a pale pastel like Tide those grey metal marks are easy to spot, so the ceramic polishing pad in the box matters; Oura describes these scuffs as erasable. If you lift weights, turning the ring towards the palm side less often, or taking it off for heavy grip work, keeps the Oura Ring 4 Ceramic Tide looking new.
What the sensors track
Red and infrared LEDs measure blood oxygen levels, while green and infrared LEDs alternate to measure heart rate, heart rate variability and respiration rate around the clock. A digital sensor tracks temperature trends and an accelerometer follows movement. From this, Oura gives a Sleep Score with deep, REM and light sleep stages, a Readiness Score, automatic detection of more than 40 activities, daytime stress and resilience, cardiovascular age, cardio capacity (a VO2 max estimate), blood oxygen sensing at night and cycle insights based on temperature. Oura’s Smart Sensing adapts to your finger to keep the data continuous.
Battery, charging and water resistance
Oura lists 5 to 8 days of battery life and says the real result depends on ring size, app settings, the features you use, activity and battery age; smaller ring sizes hold smaller batteries. A charge typically takes 20 to 80 minutes depending on how low the battery is, using the size-specific charger in the box with the included USB-C cable. The ring is water resistant up to 100 m, so showers, hand-washing and swimming are fine. It connects over Bluetooth Low Energy, supports airplane mode, and receives firmware updates automatically through the Oura app.
Size 8 and the Oura app
This Oura Ring 4 Ceramic Tide is US size 8 only. A smart ring has to sit snugly for the sensors to read well, and smart ring sizing does not always match jewellery sizing, so confirm your size before ordering; a wrong size counts as a change-of-mind return. Oura notes that ceramic rings are slightly thicker than titanium Oura Ring 4 because of the material. In the app you can link several Oura Ring 4 styles to one account and switch between them. Oura’s terms also state that after any prepaid membership period, a paid Oura Membership is required to access your data in the app.
Who This Is Not For
The Oura Ring 4 Ceramic Tide is not for anyone who wants a screen, notifications or GPS: there is no display, and everything is read in the phone app. It is not for buyers who do not want an ongoing subscription, because Oura requires a paid Membership to access your data in the app once any prepaid period ends. The Oura app is not available in Arabic; Oura lists English and eleven European languages plus Japanese. It is not a medical device and does not diagnose conditions. It does not suit people who lift heavy metal weights daily and dislike polishing, since ceramic can pick up metal marks. And this unit is size 8 only.
Ordering from Totot
Totot sells the Oura Ring 4 Ceramic Tide brand-new and genuine in its sealed box, backed by a 1-year warranty from Totot. It reaches any emirate within 3 business days at most, with free delivery on orders from AED 300, with cash on delivery or instalments via Tabby and Tamara. Items that arrive defective or not as ordered can be returned within 14 days, and any shipping damage should be reported within 48 hours of delivery. Browse more in our Wearable devices range, or see the official Oura Ring 4 Ceramic page on ouraring.com.
Oura Ring 4 Ceramic Tide Specifications
- Model: Oura Ring 4 Ceramic
- Finish: Tide (light pastel blue-green)
- Size: US 8
- Materials: High-performance zirconia ceramic exterior, seamless titanium interior
- Width: 7.9 mm
- Thickness: 3.51 mm
- Weight: 5.1–8.1 g depending on ring size
- Sensors: Red and infrared LEDs (blood oxygen); green and infrared LEDs (heart rate, HRV, respiration rate); digital temperature sensor; accelerometer
- Battery life: 5–8 days, depending on ring size, app settings, features, activity and battery age
- Charging time: Typically 20–80 minutes, depending on battery level
- Water resistance: Up to 100 m / 328 ft
- Connectivity: Bluetooth Low Energy, automatic firmware updates via the Oura app, airplane mode support
- App: Oura app for iOS and Android; English, Finnish, Japanese, German, French, Spanish, Italian, Norwegian, Swedish, Czech, Dutch, Danish; integrates with 40+ apps
- Membership: Paid Oura Membership needed to access your data in the Oura app once any prepaid period ends
- In the box: Oura Ring 4 Ceramic, size-specific charger, USB-C cable, ceramic polishing pad
- Warranty: 1-year warranty from Totot
Oura Ring 4 Ceramic Tide FAQ
What colour is the Oura Ring 4 Ceramic Tide?
Oura describes Tide as a light, pastel blue-green with a glossy ceramic finish.
Will the Tide ceramic show marks?
Yes, sometimes. Oura says the hard ceramic can pick up colour from softer metals like dumbbell handles; those scuffs are erasable with the polishing pad in the box.
How long does the battery last?
5 to 8 days, according to Oura, depending on ring size, settings, features and use.
Do I need an Oura Membership?
Yes. Oura’s terms say a paid Membership is required to access your data in the Oura app once any prepaid period ends.
Is the Oura app available in Arabic?
No. Oura lists English, Japanese and eleven European languages, but not Arabic.
Can I swim with the Oura Ring 4 Ceramic Tide?
Yes. Oura rates it water resistant up to 100 m.
Is it genuine?
Yes. We sell the genuine Oura Ring 4 Ceramic Tide, brand-new in its sealed box.
How long does delivery take?
3 business days at most across the UAE. Orders from AED 300 ship free, and the checkout page shows any current fee for your order.
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