---
product_id: 698763122
title: "Oura Ring 4 - Silver - Size 15 - Size Before You Buy"
brand: "oura"
price: "£435.86"
currency: GBP
in_stock: true
reviews_count: 13
category: "Oura"
url: https://www.desertcart.co.uk/products/698763122-oura-ring-4-silver-size-15-size-before-you-buy
store_origin: GB
region: United Kingdom
---

# Advanced health sensors Seamless app sync 7+ days battery life Oura Ring 4 - Silver - Size 15 - Size Before You Buy

**Brand:** oura
**Price:** £435.86
**Availability:** ✅ In Stock

## Summary

> 💍 Elevate your wellness game—wear the future on your finger.

## Quick Answers

- **What is this?** Oura Ring 4 - Silver - Size 15 - Size Before You Buy by oura
- **How much does it cost?** £435.86 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/698763122-oura-ring-4-silver-size-15-size-before-you-buy)

## Best For

- oura enthusiasts

## Why This Product

- Trusted oura brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Long-Lasting Power:** Enjoy over a week of use on a single wireless charge—stay connected without interruption.
- • **Smartphone Integration:** Dive deep into personalized analytics and trends via an intuitive app experience.
- • **Tailored Fit Guarantee:** Size Before You Buy kit ensures perfect fit for maximum comfort and data accuracy.
- • **Precision Health Insights:** Track heart rate, sleep stages, body temp & recovery with clinical-grade accuracy.
- • **Effortless All-Day Comfort:** Sleek, lightweight silver design fits like a second skin for continuous wear.

## Overview

The Oura Ring 4 in silver is a cutting-edge wearable ring designed for professional millennials seeking holistic health tracking. It offers advanced biometric sensors to monitor heart rate, sleep quality, body temperature, and activity levels with clinical precision. Featuring a sleek, lightweight design and over 7 days of battery life with wireless charging, it integrates seamlessly with a dedicated smartphone app for personalized health insights. The included sizing kit ensures a perfect fit, making it an essential smart accessory for those who value data-driven wellness and style.

## Description

From the manufacturer Size before you buy Easy to wear, everywhere No interruptions Built to last Accurate by design The Oura Ring 4 Sizing Kit is the best way to ensure an accurate experience. Sleek and comfortable, Oura Ring seamlessly fits into your life from a workout to a night out. Stay present without notifications on your wrist. Check the Oura App when you want to. Oura Ring 4 is fully titanium: one of the strongest metals on earth. Durable, lightweight, and water resistant. Oura Ring 4 delivers incredibly accurate data and personalised health insights to help you be at your best. Fully Titanium Oura Ring 4 is fully titanium: one of the strongest metals on earth. Durable, lightweight, water resistant. Fully Titanium Oura Ring 4 is fully titanium: one of the strongest metals on earth. Durable, lightweight, water resistant. Smart Sensing A first-of-its-kind sensing platform, Smart Sensing adapts to your unique finger, ensuring continuous, accurate data from over 30 biometrics - day and night. Smart Sensing A first-of-its-kind sensing platform, Smart Sensing adapts to your unique finger, ensuring continuous, accurate data from over 30 biometrics - day and night. Long battery life Up to 8 days of battery means you can track your health 24/7 without charging every night. Long battery life Up to 8 days of battery means you can track your health 24/7 without charging every night. Always Wearable Oura Ring 4 is more comfortable with a fully round interior with discreet, recessed sensors. It's water resistant and can withstand heat, and cold. Always Wearable Oura Ring 4 is more comfortable with a fully round interior with discreet, recessed sensors. It's water resistant and can withstand heat, and cold. Sleep Activity Readiness Stress Heart Health Women’s Health Wake up to in-depth sleep analysis, so you can improve your habits and transform how you feel. Whether running a marathon or running errands, Oura tracks your daily activity and workouts while helping you strike a balance between movement and recovery. Know when to push it and when to take it easy. Your Readiness Score tells you how energised you are using over 50 biometrics - it can even tell when you might be getting sick. Oura will help you identify signs of stress and understand how well your body handles it. You'll know when you need to incorporate more self-care practises and how to recover from long term stressors. From monitoring your daily heart rate and HRV to discovering your Cardiovascular Age and Cardio Capacity, Oura helps you take care of one of the key indicators of your overall health - your heart. Your cycle impacts your mood, sleep, activity and more, every day. Oura helps you understand how your cycle affects your body, so you can make better, informed decisions about your holistic health. Size Before You Buy Step 1 Purchase an Oura Ring 4 Sizing Kit and receive a £10 credit towards your Oura Ring. Step 2 Advanced health monitoring capabilities, including heart rate, sleep patterns, and activity tracking. Step 3 Slip on your Oura Ring 4 and download the Oura App. Step 4 New members get the first month of Oura Membership free, then it’s £5.99 per month. Oura Ring 4 What's in the Box Oura Ring 4 Charger and USB-C Cable

Review: Best bit of health kit I’ve bought! - Completely addictive, so interesting in terms of the info - I’m debating moving away from my Apple Watch as the battery on this is so much better - I always charge my watch overnight but the sleep info on the Oura is great, amazing accuracy on the patterns! The battery life i would say isn’t quite as long as described but still a few days so good enough! Super easy to set up and use, debating the travel charge case but at the moment not sure it’s needed as the charger is just USB C. Definitely worth ordering the fitting measure, I wouldn’t have had a clue but annoying when you decide you want to go for it as adds a few days before you can purchase. Once bought though a perfect fit. I bought the brushed silver and have had quite a few compliments, it’s a really nice, non flashy piece that blends well with other items of jewellery. Expensive but so far I would say worth it :)
Review: Great Product - Best health tracking product on the market. For measuring activity, stress and sleep it really is brilliant. The app is easy to use and very intuitive. Battery life is good, only charge mine for 5-10mins per day, whilst showering. Good durability, I wear it all the time and only small surface scratches are visible.

## Features

- Compact and intelligent design for comfortable everyday wear
- Advanced health monitoring capabilities, including heart rate, sleep patterns, and activity tracking
- Long battery life with convenient wireless charging
- Seamless smartphone app integration for detailed health and activity analytics
- Available in multiple finishes and sizes for personalized style

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WV7R98 |
| Age Range Description | Adult |
| Band Colour | Silver |
| Band Material Type | Stainless Steel |
| Battery Average Life | 8 days |
| Battery Capacity | 336 |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Battery capacity | 336 |
| Battery cell composition | Lithium Polymer |
| Best Sellers Rank | 1,194 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 5 in Wearable Tech Rings |
| Box Contents | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Brand Name | OURA |
| Case Material Type | Titanium |
| Closure Type | Slip On |
| Colour | Silver |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone, Tablet |
| Compatible Phone Models | all current smartphone models |
| Connectivity Technology | Bluetooth, USB |
| Connectivity technology | Bluetooth, USB |
| Controller Type | Ring |
| Country of Origin | Estonia |
| Customer Reviews | 4.3 out of 5 stars 7,454 Reviews |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Item Dimensions | 25 x 25 x 8 millimetres |
| Item Dimensions D x W x H | 25D x 25W x 8H millimetres |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate Monitor, Sleep Duration Monitor, Stress Monitor |
| Model Name | JZ90-54217-15 |
| Model Number | JZ90-54217-15 |
| Operating System | Proprietary/Custom |
| Operating system | Proprietary/Custom |
| Product Features | Advanced Health Tracking |
| Shape | Round |
| Sim Card Size | eSIM |
| Special feature | Advanced Health Tracking |
| Style Name | Minimalist |
| Supported Application | Apple Health, Google Health Connect, Natural Cycles, Flo, Strava |
| Supported Satellite Navigation System | GPS |
| Target Audience | Men |
| Warranty Type | Lifetime |
| Water Resistance Depth | 50 Metres |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IP54 |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless communication standard | Bluetooth |

## Product Details

- **Battery capacity:** 336
- **Battery cell composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity technology:** Bluetooth, USB
- **GPS:** No GPS
- **Model name:** JZ90-54217-15
- **Operating system:** Proprietary/Custom
- **Shape:** Round
- **Special feature:** Advanced Health Tracking
- **Wireless communication standard:** Bluetooth

## Images

![Oura Ring 4 - Silver - Size 15 - Size Before You Buy - Image 1](https://m.media-amazon.com/images/I/5155uTN9BPL.jpg)
![Oura Ring 4 - Silver - Size 15 - Size Before You Buy - Image 2](https://m.media-amazon.com/images/I/51Hh6q3nxxL.jpg)
![Oura Ring 4 - Silver - Size 15 - Size Before You Buy - Image 3](https://m.media-amazon.com/images/I/71ioEwzfYZL.jpg)
![Oura Ring 4 - Silver - Size 15 - Size Before You Buy - Image 4](https://m.media-amazon.com/images/I/613EYvr-lAL.jpg)
![Oura Ring 4 - Silver - Size 15 - Size Before You Buy - Image 5](https://m.media-amazon.com/images/I/61dtM3Gy4UL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: How long should my ring work between charges?**
A: Oura Ring 4 typically lasts 5-8 days on a full charge, depending on usage. Contact Oura Member Care if you have questions or concerns with battery life, and they will ensure your problem is resolved

**Q: How do I choose the right Oura Ring size?**
A: Using the Oura Ring 4 Sizing Kit, choose a finger for your ring. We recommend the index, middle or ring finger. Wear the sizer ring for 24 hours to ensure the fit is secure and comfortable over the course of your day.

**Q: What's included?**
A: Oura Ring 4, Oura Ring 4 Charger, and USB-C Cable.

**Q: How do I see my Oura Ring metrics?**
A: After activating your Oura Ring, you can choose a monthly or annual membership to unlock full access to Oura’s features, daily health and wellness metrics, and personalized guidance.

**Q: Can I use more than one ring?**
A: Oura Members can now connect more than one Oura Ring 4 to their Oura App and quickly switch between them. Note, this feature only supports wearing and syncing data from one active Oura Ring at a time.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best bit of health kit I’ve bought!
*by H***. on 21 May 2026*

Completely addictive, so interesting in terms of the info - I’m debating moving away from my Apple Watch as the battery on this is so much better - I always charge my watch overnight but the sleep info on the Oura is great, amazing accuracy on the patterns! The battery life i would say isn’t quite as long as described but still a few days so good enough! Super easy to set up and use, debating the travel charge case but at the moment not sure it’s needed as the charger is just USB C. Definitely worth ordering the fitting measure, I wouldn’t have had a clue but annoying when you decide you want to go for it as adds a few days before you can purchase. Once bought though a perfect fit. I bought the brushed silver and have had quite a few compliments, it’s a really nice, non flashy piece that blends well with other items of jewellery. Expensive but so far I would say worth it :)

### ⭐⭐⭐⭐⭐ Great Product
*by S***T on 29 May 2026*

Best health tracking product on the market. For measuring activity, stress and sleep it really is brilliant. The app is easy to use and very intuitive. Battery life is good, only charge mine for 5-10mins per day, whilst showering. Good durability, I wear it all the time and only small surface scratches are visible.

### ⭐⭐⭐⭐⭐ Don’t know where I’d be without my Oura
*by R***N on 12 May 2026*

Don’t know where I would be without my oura ring! It’s so interesting to know all the data about sleep, heart health etc. If you’re thinking about getting one, let this be the review that gets you one! Very, very convenient. I don’t wear my Apple Watch anymore as I’m a nurse and can’t wear watches. Would say that this is more accurate and better. Its tracks fitness, steps, sleep, women’s health etc. It also helped me conceive which I’m very grateful for. It is ‘bulky’ but you do get used to it! I often speak very highly of this product and got atleast 5 people to get one. I don't know where I’d be without my Oura ring

## Frequently Bought Together

- Oura Ring 4 - Silver - Size 15 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life
- Oura Ring 4 Charger - Size 15 - Charging Dock and USB-C Cable - Charges Oura Ring 4 up to 8 Days

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---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-06-07*