---
product_id: 667076052
title: "Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy"
brand: "oura"
price: "¥155753"
currency: JPY
in_stock: true
reviews_count: 8
category: "Oura"
url: https://www.desertcart.jp/products/667076052-oura-ring-4-rose-gold-size-5-size-before-you
store_origin: JP
region: Japan
---

# 8-day battery life Water resistant up to 100m Tracks 50+ health metrics Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy

**Brand:** oura
**Price:** ¥155753
**Availability:** ✅ In Stock

## Summary

> 💍 Elevate your health game with the ring that knows you best.

## Quick Answers

- **What is this?** Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy by oura
- **How much does it cost?** ¥155753 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/667076052-oura-ring-4-rose-gold-size-5-size-before-you)

## 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

- • **Size Before You Buy:** Custom sizing kit ensures perfect fit—because your health tracker should fit like a glove.
- • **Effortless All-Day Wear:** Sleek, lightweight titanium design built for 24/7 comfort and durability.
- • **Smart Sensing Precision:** Adaptive tech delivers hyper-accurate insights on sleep, stress, heart & more.
- • **Seamless App Integration:** Syncs with 40+ apps including Apple Health & Strava for holistic wellness tracking.
- • **FSA/HSA Eligible Wellness:** Use your health funds to invest in smarter self-care and recovery.

## Overview

The Oura Ring 4 in Rose Gold is a minimalist, all-titanium smart ring designed for continuous 24/7 health tracking. It monitors over 50 biometric metrics including sleep quality, heart rate, stress, and women’s health, powered by adaptive Smart Sensing technology. With up to 8 days of battery life, water resistance to 100 meters, and seamless integration with iOS and Android apps, it offers a discreet yet powerful wellness companion. The ring is FSA/HSA eligible and comes with a sizing kit to ensure the perfect fit.

## Description

Introducing Oura Ring 4: the latest evolution of the revolutionary smart ring. Oura Ring 4 brings you closer to what matters most — your health. The updated all-titanium design is powered by Smart Sensing, a new sensing platform that doesn’t just measure your biometrics, it adapts to you, providing insights into over 50 health metrics including sleep, readiness, activity, heart health, stress, metabolic health, and women’s health. Oura Ring quietly and comfortably monitors your health and with 5 to 8 days of battery life — you can forget it’s even on. With multi-ring support, change Oura Ring 4 styles as easily as changing your outfit. If you have two or more Oura Ring 4 styles, you can now switch easily between different finishes in the Oura App. Sleeker, smarter and more accurate than ever, Oura Ring 4 is made for you. Oura Ring is FSA/HSA Eligible — we can accept FSA or HSA funds for the following: Oura Ring, additional chargers, and shipping. 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: If you are always tired--this Ring tells you how to fix it in detail - Anyone who always feels tired should invest in the Oura Ring. Anyone who has not been able to be fit or improve their fitness needs this Ring. It gives you specific direction for how to increase energy and be more fit. This is my second and the gold band is very attractive not overwhelming other jewelry that I wear. The Ring is comfortable to work in, workout in, and sleep in. It is waterproof, so there's no need to remove it to shower or wash dishes which for me makes it a fitness tool I was able to stick with. I've learned a lot. The Ring deciphers why I'm tired. My sleep quality is scored and thoroughly explained with specific data not only about when I go to bed and wake up, but exactly how many hours (or minutes--yikes!) I'm in REM sleep. It tells me if today is a good day to workout hard or if it's time to take a day off and focus on rest. It tells me if I'm not getting enough physical activity in my day. All of my vitals are charted and presented in real time and across a timeline: Daytime heart rate, sleep heart rate, and even daytime stress and the toll it takes on my heart rate and my resilience is good (my daytime stress load has been met with sufficient day and nighttime recovery). The battery lasts for days and you can easily monitor batter life on your phone.
Review: Love, Love, Love!! - I’ve had the Oura ring for almost a year now and would recommend if you’re looking for a wearable that balances tracking your sleep & recovery while also looking minimal. In the beginning, it took some time getting used to having it on my finger but after a month of wearing it consistently, I barely notice it and really love how simple and sleek it looks. It also charges very quickly, so if battery life is a concern, I’d say there are few moments where I am without it. I was initially drawn to the Oura ring as I didn’t want another screen in my life, and I find that it meets the exact criteria I was looking for. I have heard that its fitness tracking isn’t the most accurate in terms of tracking your calories burned or steps walked, but I don’t really use it so much for those purposes. If fitness tracking is critical, I’d do some more research on all the options available. However, if you’re more concerned about sleep, recovery, and stress metrics, I would say it does a great job at monitoring.

## Features

- SIZE BEFORE YOU BUY - Oura Ring 4 sizes are different from standard ring sizes. Size yourself with the Oura Ring 4 Sizing Kit. For additional details, see “From the manufacturer” section below
- 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.
- 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.
- SYNC WITH YOUR FAVORITE APPS - Compatible with iOS and Android — Oura seamlessly integrates with over 40 apps including Apple Health, Google Health Connect, Natural Cycles, Flo, Strava, & more.
- LOOKING FOR THE BEST HEALTH TRACKER? - Whether you’re searching for a sleep ring or fitness ring, Oura Ring 4 is for you — this revolutionary smart ring that allows you to discreetly track your sleep, activity, recovery and stress — in style.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WWMPSB |
| Additional Features | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Band Material Type | Metal |
| Battery Average Life | 8 days |
| 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 |
| Closure Type | Slip On |
| Color | Rose Gold |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Connectivity Technology | Bluetooth |
| Customer Reviews | 4.2 out of 5 stars 7,741 Reviews |
| Display Type | No Display |
| GPS | GPS Via Smartphone |
| GPS Geotagging Functionality | GPS Via Smartphone |
| Human Interface Input | Buttons |
| Item Dimensions | 0.91 x 0.91 x 0.31 inches |
| Item Height | 0.8 centimeters |
| Manufacturer | Oura |
| Metrics Measured | Body Temperature, Menstrual Cycle, Sleep Duration, Stress |
| Model Number | JZ90-54219-05 |
| Shape | Round |
| Special Feature | Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight |
| Style Name | Minimalist |
| Supported Application | Fitness Tracker, Sleep Monitor, Heart Rate Monitor, Multisport Tracker, Health, Wellness |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adults |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Limited |
| Water Resistance Depth | 100 Meters |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Communication Standard | Bluetooth |
| Wireless Compability | Bluetooth |

## Product Details

- **Battery Cell Composition:** Lithium Polymer
- **Brand:** OURA
- **Color:** Rose Gold
- **Connectivity Technology:** Bluetooth
- **GPS:** GPS Via Smartphone
- **Shape:** Round
- **Special Feature:** Activity Tracker, Cycle Tracking, Daily Workout Memory, Lightweight
- **Style:** Minimalist
- **Target Audience:** Unisex Adults
- **Wireless Communication Standard:** Bluetooth

## Images

![Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy - Image 1](https://m.media-amazon.com/images/I/517yboOWkZL.jpg)
![Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy - Image 2](https://m.media-amazon.com/images/I/51CzPCL9TxL.jpg)
![Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy - Image 3](https://m.media-amazon.com/images/I/51JrSsfUPyL.jpg)
![Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy - Image 4](https://m.media-amazon.com/images/I/51zKmnnZU8L.jpg)
![Oura Ring 4 - Rose Gold - Size 5 - Size Before You Buy - Image 5](https://m.media-amazon.com/images/I/61Yn2xgg-FL.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

### ⭐⭐⭐⭐⭐ If you are always tired--this Ring tells you how to fix it in detail
*by S***3 on January 2, 2026*

Anyone who always feels tired should invest in the Oura Ring. Anyone who has not been able to be fit or improve their fitness needs this Ring. It gives you specific direction for how to increase energy and be more fit. This is my second and the gold band is very attractive not overwhelming other jewelry that I wear. The Ring is comfortable to work in, workout in, and sleep in. It is waterproof, so there's no need to remove it to shower or wash dishes which for me makes it a fitness tool I was able to stick with. I've learned a lot. The Ring deciphers why I'm tired. My sleep quality is scored and thoroughly explained with specific data not only about when I go to bed and wake up, but exactly how many hours (or minutes--yikes!) I'm in REM sleep. It tells me if today is a good day to workout hard or if it's time to take a day off and focus on rest. It tells me if I'm not getting enough physical activity in my day. All of my vitals are charted and presented in real time and across a timeline: Daytime heart rate, sleep heart rate, and even daytime stress and the toll it takes on my heart rate and my resilience is good (my daytime stress load has been met with sufficient day and nighttime recovery). The battery lasts for days and you can easily monitor batter life on your phone.

### ⭐⭐⭐⭐⭐ Love, Love, Love!!
*by E***A on December 19, 2025*

I’ve had the Oura ring for almost a year now and would recommend if you’re looking for a wearable that balances tracking your sleep & recovery while also looking minimal. In the beginning, it took some time getting used to having it on my finger but after a month of wearing it consistently, I barely notice it and really love how simple and sleek it looks. It also charges very quickly, so if battery life is a concern, I’d say there are few moments where I am without it. I was initially drawn to the Oura ring as I didn’t want another screen in my life, and I find that it meets the exact criteria I was looking for. I have heard that its fitness tracking isn’t the most accurate in terms of tracking your calories burned or steps walked, but I don’t really use it so much for those purposes. If fitness tracking is critical, I’d do some more research on all the options available. However, if you’re more concerned about sleep, recovery, and stress metrics, I would say it does a great job at monitoring.

### ⭐⭐⭐⭐⭐ I love it!
*by A***K on June 13, 2025*

I don't like wearing wrist watches, so having a smart ring is PERFECT for me! I love how durable it is, it's easy to clean, and the app that comes with it is GREAT! The tracking on this thing is flawless and it uses light sensors to track my vitals, so it doesn't even feel like a smart device, just a regular ring! It also charges very quickly, so if I'm using the bathroom or taking a shower at home, I just pop it on the charger for 10-15 minutes and it's good for a few days! I only do it daily just to establish a good routine, and I have forgotten before and let the battery get low, but still haven't had the power die on me yet! I can see it being an issue for lifting weights since it's coated in stainless still and a little bulky, but otherwise very comfortable for other forms of exercise! I can also see it being a problem because of the red and green light sensors at night, it might be disruptive to light sleepers in a dark room, but I just keep my hands under my blankets or pillows, and I sleep just fine! It doesn't light up all the time, just periodically throughout the night. If the tiny lights at night might bother you, you can probably put a thick sock or a glove over your hand at night to block the light. I'm personally not inconvenienced by it at night, and I like that I can't feel anything when it checks my vitals (heart rate, blood oxygen, temperature, just to name a few). I wound up subscribing to the app anually because I really liked how easy it was to set up and how thorough its analysis was for my overall health. UPDATE: Recently I noticed the ring was draining too fast between charges and I actually needed to charge it everyday! I reached out to customer service via the app, they asked a few questions, and shipped me another one immediately! It was refurbished, not brand new, but it works like new and I would never have known the difference if they didn't tell me! I keep the old one as a backup just in case since they said I don't need to send it back. I basically haven't stopped wearing the Oura ring since I put it on, and I've used it on long walks, swimming (fully submerged in water), and for general daily activities and it works great! I wash it with soap and water when I wash my hands and take it off to give it an.wxtra good wipe down before popping it on the charger or putting it back on!

## Frequently Bought Together

- Oura Ring 4 - Rose Gold - 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
- BandSmith Silicone Ring Cover Compatible with Oura Ring Protector, Elastic Case for Oura Ring Gen 4/3 Working Out - Patent Protected (Transparent+Transparent, S for 678910)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-10*