---
product_id: 661191227
title: "OURA Ring 4 Sizing Kit - Size Before You Buy"
brand: "oura"
price: "₩25547"
currency: KRW
in_stock: true
reviews_count: 13
category: "Oura"
url: https://www.desertcart.kr/products/661191227-oura-ring-4-sizing-kit-size-before-you-buy
store_origin: KR
region: South Korea
---

# Optimized fit for max data accuracy Custom sizing precision Try before you commit OURA Ring 4 Sizing Kit - Size Before You Buy

**Brand:** oura
**Price:** ₩25547
**Availability:** ✅ In Stock

## Summary

> 📏 Nail your perfect fit before you buy—because precision is the new luxury.

## Quick Answers

- **What is this?** OURA Ring 4 Sizing Kit - Size Before You Buy by oura
- **How much does it cost?** ₩25547 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/661191227-oura-ring-4-sizing-kit-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

- • **Smart Investment:** Sizing kit purchase applies a $10 credit toward your Oura Ring 4—size smart, save smart.
- • **Wear It Your Way:** Fits any finger on either hand—tailor your ring to your lifestyle and comfort.
- • **Test It Like a Pro:** Wear the sizing ring for 24+ hours to experience real-life comfort and fit.
- • **Perfect Fit, Zero Guesswork:** Custom sizing kit ensures your Oura Ring 4 fits flawlessly every time.
- • **Maximize Your Ring’s Potential:** Accurate sizing directly boosts heart rate, sleep, and activity tracking precision.

## Overview

The Oura Ring 4 Sizing Kit is a precision tool designed to help you find the exact ring size for optimal comfort and data accuracy. Unlike standard rings, Oura Ring 4 sizes differ, making this kit essential for a perfect fit. Compatible with all fingers and both hands, the kit ensures your smart ring tracks heart rate, sleep, and activity with maximum reliability. Plus, your sizing kit purchase includes a $10 credit toward your Oura Ring 4, making sizing a savvy first step in your wellness journey.

## Description

The Oura Ring 4 Sizing Kit allows for you and those around you to find the ideal fit before purchasing. With a sizing kit purchase, a 10 credit will automatically be applied to your Oura Ring 4 at checkout. A properly fitting Oura Ring 4 will result in the highest possible data accuracy, comfort, and overall experience. Oura Ring 4 sizes are slightly different from standard ring sizes, so it is important to size yourself using our tools and to follow our sizing instructions. Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 4 on your index, middle, or ring finger.

Review: A Must-Have Before Ordering Your Oura Ring - This sizing kit made choosing the right Oura Ring size easy and stress-free. The sample rings are comfortable to wear and helped me find the perfect fit before placing my order. I highly recommend wearing the test size for at least a full day and overnight since finger size can change throughout the day. It saved me from ordering the wrong size and made the whole process much easier. Definitely worth it if you’re planning to buy an Oura Ring.
Review: Buy the kit. It will give you sizing peace of mind! - This little sizing kit works great. Was able to get the correct size. I decided to wear the size I wanted from the kit for a few days to make sure it fit well when my hands changed throughout the day. When I finally purchased my Oura ring I had the perfect size. No issues at all.

## Features

- OURA RING 4 SIZING KIT - The Oura Ring 4 Sizing Kit is the ideal way to find the perfect size. It’s a custom sizer that allows for you, and those around you, to find the perfect fit before purchasing
- 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 brand” section below
- NOT STANDARD SIZING - Oura Ring 4 sizes are slightly different from standard ring sizes, so it is important to size yourself using our Oura Ring 4 Sizing Kit. Oura Ring 4 is available in sizes 4-15. There are no half sizes
- COMFORT AND ACCURACY - A properly fitting Oura Ring will result in the highest data accuracy, comfort, and overall experience
- CHOOSE A FINGER - Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 4 on your index, middle, or ring finger. Size the exact finger you plan to wear your Oura Ring 4 on
- HOW IT SHOULD FIT - Oura Ring 4 should fit securely and comfortably at the base of your finger. Your ring should not rotate as you go about normal daily tasks. We recommend wearing your ring sizer for at least 24 hours to confirm your best fit
- MATERIALS - Our sizing rings are made of plastic, while the Oura Ring 4 is crafted in full titanium for comfort. Due to the plastic mold used to make our ring sizers, they may seem less comfortable than the actual Oura Ring you’ll end up receiving

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WVWXR1 |
| Additional Features | Heart Rate Monitor, Activity Tracker, Sleep Monitor |
| Band Material Type | Stainless Steel |
| Best Sellers Rank | #387 in Electronics ( See Top 100 in Electronics ) #3 in Smart Rings |
| Brand | OURA |
| Built-In Media | Oura Ring 4 Sizing Kit |
| Cellular Technology | Not supported |
| Color | Sizing Kit |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Customer Reviews | 4.5 out of 5 stars 4,081 Reviews |
| Display Type | No Display |
| GPS | No GPS |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate, Sleep Duration |
| Model Number | JZ98-54870 |
| Shape | Round |
| Special Feature | Heart Rate Monitor, Activity Tracker, Sleep Monitor |
| Style | Sizing Kit |
| Style Name | Sizing Kit |
| Supported Application | Fitness Tracker, Sleep Monitor |
| Unit Count | 1 Count |
| Warranty Description | 1 Year Manufacturer |
| Warranty Type | Limited |
| Water Resistance Depth | 100 meters |
| Water Resistance Level | Waterproof |
| Wearable Computer Type | Smart Ring |

## Product Details

- **Band Material Type:** Stainless Steel
- **Brand:** OURA
- **Color:** Sizing Kit
- **Compatible Devices:** Smartphone
- **Compatible Phone Models:** Compatible with iOS and Android devices
- **Display Type:** No Display
- **GPS:** No GPS
- **Shape:** Round
- **Special Feature:** Heart Rate Monitor, Activity Tracker, Sleep Monitor
- **Style:** Sizing Kit

## Images

![OURA Ring 4 Sizing Kit - Size Before You Buy - Image 1](https://m.media-amazon.com/images/I/518Qh+G3I5L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ A Must-Have Before Ordering Your Oura Ring
*by A***A on June 9, 2026*

This sizing kit made choosing the right Oura Ring size easy and stress-free. The sample rings are comfortable to wear and helped me find the perfect fit before placing my order. I highly recommend wearing the test size for at least a full day and overnight since finger size can change throughout the day. It saved me from ordering the wrong size and made the whole process much easier. Definitely worth it if you’re planning to buy an Oura Ring.

### ⭐⭐⭐⭐⭐ Buy the kit. It will give you sizing peace of mind!
*by M***A on July 16, 2026*

This little sizing kit works great. Was able to get the correct size. I decided to wear the size I wanted from the kit for a few days to make sure it fit well when my hands changed throughout the day. When I finally purchased my Oura ring I had the perfect size. No issues at all.

### ⭐⭐⭐⭐⭐ Highly recommend if purchasing an Oura Ring — measure twice, buy once
*by M***L on October 21, 2025*

If you’re planning to buy the Oura Ring 4, this sizing kit is almost essential. Here’s my straight-talk review: What I liked: The sizing kit gives you multiple trial rings (sizes 4-15) to test your finger and fit. Best Buy +2 Android Authority +2 It helps you understand that Oura’s ring sizing doesn't match standard ring sizes — many users found they needed a different size than their usual jewelry ring. The fit matters a lot: the company says a proper fit leads to better comfort and data accuracy. You typically receive a credit toward your actual ring purchase, so the sizing kit effectively reduces risk. One small caveat: The sizing rings are made of plastic and feel different than the actual titanium ring. Some people notice differences in how the plastic kit fits versus the final product. You’ll need to wear the sizing ring for at least 24 hours (and ideally through normal daily activities) to check comfort, swelling, finger variation. Bottom line: If you’re buying the Oura Ring 4, get the sizing kit first. It takes away a lot of guesswork and prevents the hassle of ordering a ring that’s too loose or too tight. Measure your finger, test it over a day or two, pick the best fit — then buy the actual ring. This way your investment pays off and you get the full benefit of the ring.

## Frequently Bought Together

- Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase
- Oura Ring Gen3 Sizing Kit - Size Before You Buy The Oura Ring Gen3 - Unique Sizing - Receive Credit for Purchase
- RingConn Gen 2 Air Sizing Kit - Size First Before You Buy - Choose from 9 Sizes - Sizes 6 to 14 - Only Smart Ring

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-10-12*