The Oura Ring 4 Ceramic is Oura’s smart ring in a zirconia ceramic finish, here in Petal and US size 8. It tracks sleep, heart rate, heart rate variability, blood oxygen at night, temperature trends and activity, and shows the results in the Oura app on iOS or Android. Oura lists 5 to 8 days of battery life, depending on ring size, settings and use.
Table of Contents
Ceramic design
The exterior is high-performance zirconia ceramic and the interior is seamless titanium. Oura lists a width of 7.9mm, a thickness of 3.51mm and a weight between 5.1g and 8.1g depending on ring size.
Oura notes that minor scratches from regular wear are normal, and that erasable scuffs can appear when you handle metal objects. A ceramic polishing pad is in the box for those scuffs.
Sensors and what they track
Red and infrared LEDs measure blood oxygen levels, and green and infrared LEDs alternate to measure heart rate, heart rate variability and respiration rate 24/7. A digital sensor tracks temperature trends, and an accelerometer tracks movement and activity.
From these, the Oura Ring 4 Ceramic gives a Sleep Score with deep, REM and light sleep stages, a Readiness score, activity and stress tracking, heart health features and women’s health features. Oura’s Smart Sensing adapts to your finger for continuous data.
Battery and charging
Oura lists 5 to 8 days of battery life. The real figure depends on ring size, app settings, the features you turn on, activity and battery age, so smaller rings and more features sit at the lower end. Charging typically takes 20 to 80 minutes depending on the battery level, using the size-specific charger in the box.
Water resistance and connectivity
Oura rates the ring as water resistant up to 100m, so you can wear it in the shower and the pool. It connects over Bluetooth Low Energy, supports airplane mode, and updates its firmware automatically through the Oura app, which is available on iOS and Android and integrates with more than 40 apps.
Size 8: check before you order
This listing is US size 8 only. A smart ring has to fit closely for the sensors to read correctly, and smart ring sizes do not always match jewellery sizes. If you are not sure of your size, message us before ordering, because a ring that does not fit is a change-of-mind return.
Who the Oura Ring 4 Ceramic is not for
It is not for anyone who wants a screen, notifications or GPS: the ring has no display and shows everything in the phone app. It is not a medical device, so it does not diagnose conditions. It is not for anyone who does not know their ring size, because this unit is size 8 only.
Oura lists the app in English and several European languages and Japanese; Arabic is not on Oura’s list.
Finishes
Oura makes the Oura Ring 4 Ceramic in Midnight, Cloud, Tide and Petal. This page is Petal in size 8. Also in stock in size 8: Cloud and Tide. You can browse all our wearable devices too.
Warranty, delivery and returns
Totot covers the Oura Ring 4 Ceramic with a 1-year warranty against manufacturing defects. Delivery across the UAE takes up to 3 business days and is free here, because orders of AED 300 or more ship free.
Please check the ring when it arrives and report any damage within 48 hours. Returns are accepted within 14 days. If the fault is ours, the return is free with a full refund. For a change of mind, including a wrong size, the customer pays the actual return shipping and payment gateway fees.
Technical Specifications
- Model: Oura Ring 4 Ceramic
- Finish: Petal
- Size: US 8
- Materials: Zirconia ceramic exterior, titanium interior
- Width and thickness: 7.9mm wide, 3.51mm thick
- Weight: 5.1–8.1g depending on size
- Sensors: Red, green and infrared LEDs, temperature sensor, accelerometer
- Tracks: Sleep, heart rate, HRV, blood oxygen, respiration, temperature trends, activity
- Battery: 5–8 days, depending on size and use
- Charging: 20–80 minutes typically
- Water resistance: Up to 100m
- Connectivity: Bluetooth Low Energy, airplane mode
- App: Oura app, iOS and Android
- In the box: Ring, size-specific charger, USB-C cable, ceramic polishing pad
- Warranty: 1 year from Totot against manufacturing defects
Specifications on this page come from the official Oura Ring 4 Ceramic page on ouraring.com. Where Oura ties a number to a condition, such as battery life depending on ring size, settings and use, we keep the condition with the number. Full details are published on the Oura Ring 4 Ceramic official page.
FAQ
How long does the Oura Ring 4 Ceramic battery last?
5 to 8 days, according to Oura. It depends on ring size, settings and use.
Is the Oura Ring 4 Ceramic waterproof?
Yes, water resistant up to 100m, according to Oura.
Does the Oura Ring 4 Ceramic work with Android?
Yes. The Oura app is available on iOS and Android.
Does the Oura Ring 4 Ceramic scratch?
Oura says minor scratches from regular wear are normal, and scuffs from metal can be erased with the polishing pad in the box.
What size is this Oura Ring 4 Ceramic?
US size 8. Message us before ordering if you are not sure of your size.
Does Totot deliver the Oura Ring 4 Ceramic across the UAE?
Yes. Delivery is free because orders of AED 300 or more ship free, and it arrives within up to 3 business days.
Browse more in our wearable devices range. Every order from Totot carries a 1-year warranty covering manufacturing defects, with our 14-day return policy for defective or non-compliant items, and nationwide UAE delivery.
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