--- product_id: 718989678 title: "Oura 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: "€ 786.39" currency: EUR in_stock: true reviews_count: 13 category: "Oura" url: https://www.desertcart.be/products/718989678-oura-ring-4-smart-ring-size-first-with-oura-ring store_origin: BE region: Belgium --- # 8 days battery life 30+ biometric sleep & health metrics Water-resistant titanium design Oura 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:** € 786.39 **Availability:** ✅ In Stock ## Summary > 💍 Elevate your wellness game—wear the future on your finger. ## Quick Answers - **What is this?** Oura 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?** € 786.39 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/718989678-oura-ring-4-smart-ring-size-first-with-oura-ring) ## 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 - • **Unplug & Go:** Up to 8 days of battery life means freedom from constant charging and distractions. - • **Durable Meets Discreet:** All-titanium, water-resistant design built for 24/7 wear—comfort and resilience in one sleek ring. - • **Size Before You Commit:** Get the perfect fit with the Oura Ring 4 Sizing Kit—no guesswork, just precision. - • **Exclusive Oura Membership:** Enjoy your first month free and unlock personalized insights with the Oura app community. - • **Smart Sensing, Smarter You:** Track 30+ biometrics including heart rate, sleep, stress, and women’s health with adaptive accuracy. ## Overview The Oura Ring 4 is a minimalist, all-titanium smart ring designed for continuous 24/7 wear. It tracks over 30 health metrics including sleep, heart rate, and stress with adaptive Smart Sensing technology. Featuring up to 8 days of battery life and water resistance, it offers a seamless blend of durability and comfort. The purchase includes a sizing kit for a perfect fit and a free first month of Oura membership for personalized health insights. ## 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. With a purchase of the sizing kit, you'll receive a credit towards your Oura Ring 4. 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 30 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 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. Oura Ring 4 What's in the Box Oura Ring 4 Charger and USB-C Cable ## 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 | B0D9WWLN7H | | Age Range | Adult | | Batteries | 1 Lithium Polymer batteries required. (included) | | Batteries Included? | Yes | | Best Sellers Rank | #83 in Electronics ( See Top 100 in Electronics ) #1 in Wearable Tech Rings | | Brand | OURA | | Color | Stealth | | Compatible with | Smartphone | | Customer Reviews | 4.0 4.0 out of 5 stars (6,210) | | Date First Available | 11 April 2025 | | Display Type | No Display | | Features | Activity Tracker | | Included Components | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable | | Item model number | JZ90-54218-05 | | Manufacturer | Oura | | Meter | Heart Rate, Sleep Duration | | Number of Items | 1 | | Product Dimensions | 2.7 x 2.7 x 0.8 cm; 181 g | | Shape | Round | | Size | 5 | | Style | Minimalist | ## Product Details - **Battery cell composition:** Lithium Polymer - **Connectivity technology:** Bluetooth - **Operating system:** Android - **Special features:** Activity Tracker - **Wireless communication standard:** Bluetooth ## Images ![Oura 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/51-7ivDG+6L.jpg) ![Oura 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 2](https://m.media-amazon.com/images/I/61KAEE1F05L.jpg) ![Oura 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 3](https://m.media-amazon.com/images/I/51IDrh-0YEL.jpg) ![Oura 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 4](https://m.media-amazon.com/images/I/61PpbYwSK1L.jpg) ![Oura 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 5](https://m.media-amazon.com/images/I/71H17unV-KL.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 ### ⭐⭐⭐⭐⭐ Review *by R***U on 26 August 2025* ### ⭐⭐⭐⭐⭐ Review *by T***E on 23 November 2025* ### ⭐ Review *by A***Y on 16 February 2026* ## Frequently Bought Together - Oura Ring 4 - Stealth - Size 12 - 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 12 - Charging Dock and USB-C Cable - Charges Oura Ring 4 up to 8 Days --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/718989678-oura-ring-4-smart-ring-size-first-with-oura-ring](https://www.desertcart.be/products/718989678-oura-ring-4-smart-ring-size-first-with-oura-ring) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-04-25*