Name: Oura Ring 4 Size 10 Gray
Brand: Oura
SKU: 979639
Price: 379 EUR
Availability: InStock
Rating: 10 (1 reviews)

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Product information
Buy and use the Oura Ring in 3 steps
Reviews
Accessories
Insurance
Specifications

Product information

Key specs

	Compatible with operating system	Android, iOS
	Height	11,3 mm
	Quality of sports readings	Decent
	Quality of health readings	Good
	Battery life in time mode	8 days
	Type of heart rate measurement	Optical heart rate measurement
	Required iPhone model	No impact
	Required Android version smartphone	Android 13.0 or higher

Show all specifications

Pros and cons

According to our smartwatch expert

You gain a lot of insight into your health and tips to improve your lifestyle.
You wear this health and activity tracker around your finger, so you can still wear a regular watch around your wrist.
The ring lasts 5 to 8 days on a full change, so you don't have to charge it often.
You need a special Oura subscription if you want to use all functions.

Description

First order a sizing kit before you order an Oura Ring 4. That way, you buy the right size right away. An Oura Ring size is different from your regular ring size. You'll receive the € 10 purchase price as a credit. You can use this credit when you buy an Oura Ring 4 at Coolblue.

Learn all about your health and measure your daily activity with the Oura Ring 4 Size 10 Gray. With this light titanium ring, you gain insight into your sleep, your heart condition, and your stress level. You can also keep track of all your workouts and women can gain insight into their menstrual cycle. You wear this activity tracker around your finger. That way, you have enough space around your wrist for a regular, classic watch. You also receive tips based on your data. A breathing exercise when you're stress levels are high, for example. The Oura Ring 4 is sweat-proof and water-resistant. This means you can keep it on while exercising and when you're in the shower. With a full battery, this smart ring lasts 5 to 8 days.

Note: you need a subscription if you want access to all functions of the Oura Ring 4. You can take out this monthly or yearly subscription in the Oura app during the installation. You need a credit card for this.

Tips for using this product

Included by default

Manual
Charging station
USB-C cable

Buy and use the Oura Ring in 3 steps

1
Order an Oura Ring sizing kit first
Try the sizing rings, so you can be sure which size you need.
2
Buy your Oura Ring
Choose the right Oura Ring size and use the credit for a discount.
3
Download the Oura app and connect your ring
Set up your Oura Ring and choose your subscription (credit card required).

View all Oura Ring 4 models

Reviews

Rating

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Most helpful reviews

Review is 10 out of 10.

Ideal for accurate insight into your energy and rest.

Clearly
Helpful
Not yet

It is a good idea to purchase a sizing kit before ordering the Oura ring, so you can properly test the size first (wear it for at least 24 hours). I initially thought I needed a specific size, but apparently my fingers swell up a lot at night. Without the sizing kit, that size would have been a major mispurchase.

The ring is very pleasant to use. The app provides very clear insight into my day. Because I have energy issues due to Long Covid, this overview helps me enormously to determine when I need to rest. The ring tracks your sleep, restedness, heart rate, steps, calorie burn, activities, breathing, and much more! Additionally, it can also be used underwater, I believe up to 100 meters.

Review by:
Mostapha
Date:
22 May 2026
Translation:
Automatically translated from Dutch

Insure your smartwatch

Coolblue takes care of everything, from taking out an insurance to repairs
For almost all accidents
More coverage in case of damage than your standard warranty
No deductible

How do I insure my smartwatch?

First, add your smartwatch to your shopping cart. On the next page, choose one of the Protection Plans below. You always have a 30-day return window and pay no deductible in case of damage or theft.

2-year Protection Plan
€ 48,99
one-time
2-year Protection Plan with theft cover
€ 60,-
one-time
Protection Plan - Monthly cancelable
€ 3,64
per month
Protection Plan with theft cover - Monthly cancelable
€ 4,21
per month

Specifications

Product

Product
	Product number	979639
	Manufacturer code	JZ90-54218-10
	Brand	Oura
	Warranty	2 years
	Processing of your defect	Carry-in warranty

Operating system

Operating system
	Compatible with operating system	Android, iOS
	Required iPhone model	No impact
	Required Android version smartphone	Android 13.0 or higher
	Operating system	Brand-specific
	Year introduced	2024
	Guaranteed support with updates	Unknown

Physical properties

Physical properties
	Watch case color	Black
	Watch case material	Titanium
	Watch case shape	Round
	Height	11,3 mm
	Width	11,3 mm
	Depth	3,5 mm
	Weight	0,18 g
	Shockproof

Band properties

Band properties
	Interchangeable watch strap

Screen properties

Screen properties
	Always-on display
	Touchscreen
	Color screen
	Adjustable watch face

Battery

Battery
	Battery life in time mode	8 days
	Battery life in sports mode	5 days
	Battery/battery capacity	0,0255 Ah
	Energy source solar power
	Wireless charging

Connectivity

Connectivity
	Bluetooth
	ANT+
	Independent music player
	Music controls
	Built-in microphone
	Built-in speakers
	Spoken directions
	Call options	None
	Smart reply
	App installation possible
	Camera operation

Daily activities

Daily activities
	Pedometer
	Measures distance
	Speedometer
	Calorie counter
	Measures stairs climbed

Heart rate measurement

Heart rate measurement
	Heart rate measurement
	Heart rate zones
	Type of heart rate measurement	Optical heart rate measurement
	Heart rate measurement under water

Health properties

Health properties
	Quality of health readings	Good
	Skin temperature sensor
	Oximeter
	Blood pressure monitor
	EDA sensor
	Sleep score
	Average heart rate during sleep
	Measure recovery during sleep
	Menstrual cycle tracking
	Pregnancy monitoring

Sports properties

Sports properties
	Quality of sports readings	Decent
	Manual training programs
	Measure fitness age
	Recovery advice
	Interval training
	VO2 max measurement
	Measures average speed during activity
	Lap counter
	Race prognosis
	ATM score	10

GPS

GPS
	Built-in GPS receiver

Sensors

Sensors
	Compass
	Altimeter
	Barometer
	Thermometer

Other functionalities

Other functionalities
	Fall detection
	Alarm function
	Geofencing

This is the one

Oura Ring 4 Size 10 Gray

Review is 10 out of 10, based on 1 review.

anything for a smile

Delivered, when it suits you

Oura Ring 4 Size 10 Gray

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