Name: Oura Ring 4 Size 11 Gray
Brand: Oura
SKU: 979640
Price: 449 EUR
Availability: InStock
Rating: 10 (2 reviews)

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Delivered for free when it suits you

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

Product information

Pros and cons

According to our unknown 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 11 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

This is what you get

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).

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 Nederlands

Review is 10 out of 10.

Fantastic!

I used to have an Apple Watch, but this OURA ring 4 is much more feature-rich and wears fantastically!

Review by:
Caroline
Date:
7 June 2026
Translation:
Automatically translated from Nederlands

Specifications

Product

Product
	Product number	979640
	Manufacturer code	JZ90-54218-11
	Brand	Oura
	Warranty	2 years
	Processing of your defect	Carry-in warranty

This is the one

Oura Ring 4 Size 11 Gray

Review is 10 out of 10, based on 2 reviews.

anything for a smile

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Oura Ring 4 Size 11 Gray

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