---
product_id: 671382881
title: "Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life"
brand: "oura"
price: "€ 718.06"
currency: EUR
in_stock: true
reviews_count: 13
category: "Oura"
url: https://www.desertcart.hr/products/671382881-ring-4-smart-ring-size-first-with-oura-ring-4
store_origin: HR
region: Croatia
---

# 8 days battery life All-titanium durable & sleek design 30+ biometric sleep & health metrics Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life

**Brand:** oura
**Price:** € 718.06
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life by oura
- **How much does it cost?** € 718.06 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/671382881-ring-4-smart-ring-size-first-with-oura-ring-4)

## 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

- • **Smart Sensing Tech:** Tracks 30+ biometrics including heart rate, sleep, stress & women’s health with adaptive accuracy.
- • **24/7 Wearable Comfort:** Lightweight, water-resistant titanium ring designed for all-day, every-day wear.
- • **Ultra-Long Battery Life:** Up to 8 days of uninterrupted tracking—stay connected without constant charging.
- • **Exclusive Oura Membership:** Unlock personalized insights with a free first month and premium app features.
- • **Precision Sizing Kit Included:** Get your perfect fit before you buy—no guesswork, just comfort.

## Overview

The Oura Ring 4 is a sleek, all-titanium smart ring designed for continuous health and fitness tracking. It offers up to 8 days of battery life and monitors over 30 biometric signals including sleep, heart rate, stress, and women’s health metrics. With a precision sizing kit and a comfortable, water-resistant design, it’s built for 24/7 wear. The ring pairs with the Oura app, providing personalized insights through a membership model that starts with a free month.

## Description

Oura Ring 4 - Silver - Size 5 - Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life : desertcart.ae: Electronics

Review: Pricey and good quality - No wonder it is priced very high but it delivers the quality justifying the price tag
Review: dying battery render the ring useless, free replacement seamlessly provided - Product works as expected and is hepful. After 7 months of usage battery is dying, resisiting less than one day after full charged. I contacted the seller, and free replacement arrived in couple of days, no need to return the mafunctioning one. As such, a one star reviewe turned into a 5 stars.

## Features

- SIZE BEFORE YOU BUY - Oura Ring 4 sizes are different from standard ring sizes. Size yourself with the Oura Ring 4 Sizing Kit and receive a dh35.00 desertcart credit towards the future purchase of an Oura Ring 4.
- OURA MEMBERSHIP - First month of membership is free with your purchase, $6.99/mo afterwards. Offer available to new members only. Or opt for the annual prepaid option for $79.99. Membership is tied to your account via the Oura App, not your physical ring.
- ACCURACY - SMART SENSING - Oura tracks over 30 biometrics, 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.
- DESIGNED FOR 24/7 WEAR - The updated design of the Oura Ring 4 is more comfortable, fits better than ever, and is water resistant. The first all-titanium smart ring combines exceptional durability with a gentle touch, even for sensitive skin.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WWJ9VY |
| Age Range | Adult |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Batteries Included? | Yes |
| Best Sellers Rank | #36 in Sporting Goods ( See Top 100 in Sporting Goods ) #1 in Wearable Tech Rings #2 in Activity Trackers |
| Brand | OURA |
| Color | Silver |
| Compatible with | Smartphone |
| Customer Reviews | 4.0 4.0 out of 5 stars (5,288) |
| Date First Available | 11 April 2025 |
| Display Type | No Display |
| Features | Advanced Health Tracking, Adaptive Biometric Sensing |
| Included Components | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Item model number | JZ90-54217-05 |
| Manufacturer | Oura |
| Meter | Heart Rate, Sleep Duration, Activity, Stress, Heart Health |
| Number of Items | 1 |
| Product Dimensions | 2.3 x 2.3 x 0.7 cm; 181 g |
| Shape | Round |
| Size | 5 |
| Sport | Fitness |
| Style | Minimalist |

## Product Details

- **Battery cell composition:** Lithium Polymer
- **Connectivity technology:** USB
- **Operating system:** Proprietary OS
- **Special features:** Advanced Health Tracking, Adaptive Biometric Sensing
- **Wireless communication standard:** Bluetooth

## Images

![Ring 4 | Smart Ring | Size First with Oura Ring 4 Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days Battery Life - Image 1](https://m.media-amazon.com/images/I/51ul5++ZdWL.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

### ⭐⭐⭐⭐⭐ Pricey and good quality
*by T***E on 23 November 2025*

No wonder it is priced very high but it delivers the quality justifying the price tag

### ⭐⭐⭐⭐⭐ dying battery render the ring useless, free replacement seamlessly provided
*by R***U on 26 August 2025*

Product works as expected and is hepful. After 7 months of usage battery is dying, resisiting less than one day after full charged. I contacted the seller, and free replacement arrived in couple of days, no need to return the mafunctioning one. As such, a one star reviewe turned into a 5 stars.

### ⭐ Waste of money!
*by M***S on 27 September 2025*

Total waste of money! Zero after sales service and their system is compromised. Nothing against the seller but the issue I have is with Oura. My card details were leaked after paying for the membership and there is no support at all from oura neither is it very easy to speak to a human and get a resolution. I am stuck with a 1200 AED useless piece of junk

## Frequently Bought Together

- Oura Ring 4 - Silver - Size 5 - Smart Ring - Size First with Oura Ring 4 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - Up to 8 Days of Battery Life
- 3 Pack Cover Compatible with Oura Ring Gen 4/Oura Ring Gen 3 Horizon/Gen 3 Heritage, Surport Charging with Cover on, Anti-Scratch TPU Protector for Men Women Workout Gym
- ULTRAHUMAN Ring AIR-Smart Ring Health Tracker, Size First Sizing Kit,Sleep Tracker,Smart Ring for Men/Women,Fitness Tracker (Made in India, Swatch Sizing Kit, Swatch Sizing Kit)

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**Shop now:** [https://www.desertcart.hr/products/671382881-ring-4-smart-ring-size-first-with-oura-ring-4](https://www.desertcart.hr/products/671382881-ring-4-smart-ring-size-first-with-oura-ring-4)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-04*