---
product_id: 661427971
title: "Oura Ring 4 - Silver - Size 9 - Size Before You Buy"
brand: "oura"
price: "€ 618.00"
currency: EUR
in_stock: true
reviews_count: 13
category: "Oura"
url: https://www.desertcart.fr/products/661427971-oura-ring-4-silver-size-9-size-before-you-buy
store_origin: FR
region: France
---

# 8-day battery life Water resistant up to 100m Tracks 50+ health metrics Oura Ring 4 - Silver - Size 9 - Size Before You Buy

**Brand:** oura
**Price:** € 618.00
**Availability:** ✅ In Stock

## Summary

> 💍 Elevate your health game with the ring everyone’s talking about!

## Quick Answers

- **What is this?** Oura Ring 4 - Silver - Size 9 - Size Before You Buy by oura
- **How much does it cost?** € 618.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/661427971-oura-ring-4-silver-size-9-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

- • **Precision Fit, No Guesswork:** Unique sizing kit ensures your perfect Oura Ring 4 fit every time.
- • **Sleek, Durable, and Waterproof:** Titanium and ceramic build with IP68 rating keeps up with your active lifestyle.
- • **Effortless Power, Extended Wear:** Up to 8 days battery life means less charging, more living.
- • **All-Day, All-Night Health Insights:** Monitor sleep, stress, heart, and women’s health with 50+ smart sensors.
- • **FSA/HSA Eligible Wellness Investment:** Use your health savings for a smarter, stylish way to track your wellbeing.

## Overview

The Oura Ring 4 in Silver is a minimalist smart ring crafted from durable titanium and ceramic, designed for continuous health tracking. It delivers precise insights on over 50 metrics including sleep, activity, stress, and women’s health, powered by adaptive Smart Sensing technology. With up to 8 days of battery life and water resistance up to 100 meters, it fits seamlessly into any lifestyle. The ring requires a unique sizing kit for optimal fit and includes a free first-month membership to the Oura app, making it a cutting-edge wellness companion eligible for FSA/HSA funds.

## Description

Oura Ring 4 Ceramic is a modern expression of our revolutionary smart ring technology, blending refined elegance with everyday durability. The high-performance ceramic exterior is designed to keep up with you. The Ceramic Collection is available in sizes 4-15 and three unique colors: Petal, Tide and Cloud. Each new color is built to accent your style and personality. This colorful new take comes with the same cutting-edge technology of Oura Ring 4. Track over 50 health metrics and get personalized insights into your sleep, activity, readiness, stress, heart health, metabolic health, women's health and more. It is built around a breakthrough sensing technology, Smart Sensing, which adapts to your finger to deliver accurate, continuous data. With 5-8 days of battery life, you'll see a complete picture of your health. It's designed with recessed sensors on the interior, making it comfortable and gentle, even on sensitive skin. Oura Ring is FSA/HSA Eligible — we can accept FSA or HSA funds for the following: Oura Ring, additional chargers, and shipping. Oura Ring 4 Ceramic Polishing Pad: Keep your Oura Ring 4 Ceramic looking like new with the Ceramic Polishing Pad, redeemable once you sync your purchase in the Oura App. Due to the hardness of the zirconia ceramic, it can take on the color of softer metals, like a dumbbell or cookware. Over time, you may notice grey marks on your Oura Ring 4 Ceramic. Rest assured, it's not damaged — it's evidence of a metal transfer and easy to remove with proper cleaning. Use caution when handling metal objects and consider removing your Oura Ring for some activities. The Oura Ring 4 Ceramic Polishing Pad is your partner in keeping your ring in top condition. IMPORTANT: Size yourself with the Oura Ring Sizing Kit before you buy — Oura Rings are not US standard sizing, and finding the right size will result in the best experience possible. With a sizing kit purchase, a credit will automatically be applied to your Oura Ring at checkout.

Review: More in-depth insights 🔥 - I absolutely love the Oura ring and think it’s worth the money! 💰 I love my Apple Watch insights and use the ring as an added measure to really help me understand my energy, stress, and daily readiness. This things I pretty darn accurate. I went and donated blood one day and it was able to detect my bodies response afterward. It let me know my body was showing signs of engaged stress and I should take it easy. It gives you a readiness status based on the previous day and also your stats for today. I can say that usually when it’s telling me I should rest it’s right and when it’s telling me I am more primed to go I feel that way as well. Can’t wait to learn more about my health using it, I haven’t had it for long but I am already impressed! Also I didn’t bother ordering the sizing kit. I knew it would fit one of my fingers either the index or ring. I ordered a standard size 9. It fits my ring finger with a little space and my index finger snug. So I sleep with it on my ring finger since fingers to swell at night. It’s comfortable either way though!
Review: The Oura ring is the BEST!! - I absolutely LOVE my Oura ring. It has exceeded all of my expectations. As someone who previously wore a fitness watch, I say that the ring is much more comfortable, cute, and convenient. I wear it 24/7, including overnight for sleep tracking and rarely notice it there. This is coming from someone who used to take off all my jewelry before going to bed. The only time I take it off is when I am showering and that is when I charge it! The ring is able to go in water though which makes it super convenient for swimming and life with kids.The battery life is phenomenal, meaning I don’t have to constantly worry about charging it. It’s been very accurate for monitoring my cycle as well. You can double it with natural cycles as a very accurate form of natural birth control/cycle monitoring. It’s also surprisingly stylish and sleek. If you want an overall fitness/health tracker, this is the one for you!

## Features

- ACCURATE SIZING ESSENTIAL - Oura Ring 4 uses unique sizing different from standard jewelry rings; use the Oura Ring 4 Sizing Kit to find your perfect fit before purchasing
- OURA MEMBERSHIP - First month of membership is included with purchase, for new members only. Subscription is 5.99/mo afterwards. Or opt for the annual prepaid option for 69.99. Membership is tied to your account via the Oura App, not your physical ring
- ACCURACY - SMART SENSING - Oura tracks over 50 health metrics, including sleep, activity, stress, heart health, and women’s health metrics. Oura Ring 4 is powered by Smart Sensing, which adapts to you — delivering accurate, continuous data, day and night
- LONG LASTING BATTERY - With up to 8 days of battery life, no screens and no vibrations, Oura Ring 4 allows you to focus on the present. From a workout to a night out — you’re free to forget it’s on. Until you start getting compliments
- HSA/FSA ELIGIBLE - We can accept HSA or FSA funds for the following: Oura Ring, additional chargers, and shipping

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WWB3WX |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Age Range Description | Adult |
| Band Color | Silver |
| Band Material Type | Titanium |
| Battery Average Life | 8 days |
| Battery Capacity | 22 |
| Battery Cell Composition | Lithium Polymer |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Best Sellers Rank | #38 in Electronics ( See Top 100 in Electronics ) #1 in Smart Rings |
| Brand | OURA |
| Built-In Media | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide |
| Case Material Type | Titanium |
| Closure Type | Slip On |
| Color | Silver |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Android Devices, iOS Devices |
| Connectivity Technology | Bluetooth |
| Controller Type | Ring |
| Customer Reviews | 4.2 out of 5 stars 7,720 Reviews |
| Display Type | No Display |
| GPS | No GPS |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Buttons |
| Item Dimensions | 1.02 x 1.02 x 0.28 inches |
| Item Height | 0.7 centimeters |
| Manufacturer | Oura |
| Metrics Measured | Body Temperature, Menstrual Cycle, Sleep Duration, Stress |
| Model Name | Oura Ring 4 |
| Model Number | JZ90-54217-09 |
| RAM Memory Installed | 512 KB |
| Shape | Round |
| Special Feature | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Style Name | Minimalist |
| Supported Application | Fitness Tracker |
| Target Audience | Unisex Adult |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Standard/Full |
| Water Resistance Depth | 100 Meters |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | IP68 |
| Wearable Computer Type | Smart Ring |
| Wireless Communication Standard | Bluetooth |
| Wireless Compability | Bluetooth |

## Product Details

- **Battery Capacity:** 22
- **Battery Cell Composition:** Lithium Polymer
- **Brand:** OURA
- **Connectivity Technology:** Bluetooth
- **GPS:** No GPS
- **Model Name:** Oura Ring 4
- **Shape:** Round
- **Special Feature:** Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight
- **Style:** Minimalist
- **Wireless Communication Standard:** Bluetooth

## Images

![Oura Ring 4 - Silver - Size 9 - Size Before You Buy - Image 1](https://m.media-amazon.com/images/I/51ul5++ZdWL.jpg)

## 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

### ⭐⭐⭐⭐⭐ More in-depth insights 🔥
*by C***R on January 14, 2026*

I absolutely love the Oura ring and think it’s worth the money! 💰 I love my Apple Watch insights and use the ring as an added measure to really help me understand my energy, stress, and daily readiness. This things I pretty darn accurate. I went and donated blood one day and it was able to detect my bodies response afterward. It let me know my body was showing signs of engaged stress and I should take it easy. It gives you a readiness status based on the previous day and also your stats for today. I can say that usually when it’s telling me I should rest it’s right and when it’s telling me I am more primed to go I feel that way as well. Can’t wait to learn more about my health using it, I haven’t had it for long but I am already impressed! Also I didn’t bother ordering the sizing kit. I knew it would fit one of my fingers either the index or ring. I ordered a standard size 9. It fits my ring finger with a little space and my index finger snug. So I sleep with it on my ring finger since fingers to swell at night. It’s comfortable either way though!

### ⭐⭐⭐⭐⭐ The Oura ring is the BEST!!
*by L***N on December 2, 2025*

I absolutely LOVE my Oura ring. It has exceeded all of my expectations. As someone who previously wore a fitness watch, I say that the ring is much more comfortable, cute, and convenient. I wear it 24/7, including overnight for sleep tracking and rarely notice it there. This is coming from someone who used to take off all my jewelry before going to bed. The only time I take it off is when I am showering and that is when I charge it! The ring is able to go in water though which makes it super convenient for swimming and life with kids.The battery life is phenomenal, meaning I don’t have to constantly worry about charging it. It’s been very accurate for monitoring my cycle as well. You can double it with natural cycles as a very accurate form of natural birth control/cycle monitoring. It’s also surprisingly stylish and sleek. If you want an overall fitness/health tracker, this is the one for you!

### ⭐ DON’T WASTE YOUR MONEY
*by S***A on February 16, 2026*

I purchased this ring in July, & at first I thought it was exceptional. It was easy to size, comfortable to wear, & gave me an enormous amount of data to understand what was happening in my body. But it’s now February and it will no stay charged a complete day. It also has more trouble connecting to the app than ever before. I was so excited I read all the instructions and tips, I kept it clean, charged appropriately, & it’s never seen more than typical daily wear and tear. Disappointed doesn’t even begin to describe how I feel, especially since I spent 6 months getting attached only to now have it fail me. I can’t help but wonder was this an intentional money grab now that the company released the portable charger? Looking for an alternative ring now- don’t waste your money & excitement like I did!

## Frequently Bought Together

- Oura Ring 4 - Silver - Size 9 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life
- sylacor Ring Cover for Oura Ring Gen 4/ Gen 3, Anti-Scratch Elastic Silicone Oura Ring Case Protector for Men Women Working Out Gym
- 10 Pack Ring Cover Compatible with Oura Ring Gen 4/Oura Ring Gen 3 Horizon/Gen 3 Heritage, Surport Charging with Cover on, Anti-Scratch Elastic Silicone Ring Protector for Men Women Working Out Gym

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---

*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-03-01*