---
product_id: 661191227
title: "OURA Ring 4 Sizing Kit - Size Before You Buy the Ring 4 | Unique Sizing, Not Standard US Ring Sizes - Receive Credit for Oura Ring 4 Purchase"
brand: "oura"
price: "€ 18.30"
currency: EUR
in_stock: true
category: "Oura"
url: https://www.desertcart.com.cy/products/661191227-oura-ring-4-sizing-kit-size-before-you-buy-ring
store_origin: CY
region: Cyprus
---

# Optimizes wearable data accuracy Custom sizing, no guesswork Precision sizing for perfect fit OURA Ring 4 Sizing Kit - Size Before You Buy the Ring 4 | Unique Sizing, Not Standard US Ring Sizes - Receive Credit for Oura Ring 4 Purchase

**Brand:** oura
**Price:** € 18.30
**Availability:** ✅ In Stock

## Summary

> 📏 Nail your perfect fit before you buy—because precision matters.

## Quick Answers

- **What is this?** OURA Ring 4 Sizing Kit - Size Before You Buy the Ring 4 | Unique Sizing, Not Standard US Ring Sizes - Receive Credit for Oura Ring 4 Purchase by oura
- **How much does it cost?** € 18.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/661191227-oura-ring-4-sizing-kit-size-before-you-buy-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

- • **Bonus Credit Included:** Sizing kit purchase applies a $10 credit toward your Oura Ring 4 purchase—smart savings!
- • **Try Before You Commit:** Wear the sizer for 24+ hours to confirm comfort and secure fit—no surprises.
- • **Perfect Fit, Every Time:** Custom plastic sizers mimic Oura Ring 4 sizes for flawless comfort and accuracy.
- • **Data Accuracy Starts Here:** Proper sizing ensures your ring delivers the most precise heart rate and sleep tracking.
- • **Fits Any Finger, Any Hand:** Designed for index, middle, or ring fingers on either hand for maximum versatility.

## Overview

The Oura Ring 4 Sizing Kit is an essential tool for finding your exact ring size, tailored specifically to Oura’s unique sizing system. By ensuring a secure and comfortable fit on your chosen finger, it maximizes the accuracy of your health metrics like heart rate and sleep tracking. Compatible with all fingers and both hands, this plastic sizing kit lets you test wear for 24 hours before committing, and includes a $10 credit toward your Oura Ring 4 purchase.

## 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.

## 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 | #314 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 4.5 out of 5 stars (4,021) |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate, Sleep Duration |
| Model Number | JZ98-54870 |
| Shape | Round |
| 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 | Water Resistant |
| 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 the Ring 4 | Unique Sizing, Not Standard US Ring Sizes - Receive Credit for Oura Ring 4 Purchase - Image 1](https://m.media-amazon.com/images/I/518Qh+G3I5L.jpg)

## Available Options

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

## 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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**Shop now:** [https://www.desertcart.com.cy/products/661191227-oura-ring-4-sizing-kit-size-before-you-buy-ring](https://www.desertcart.com.cy/products/661191227-oura-ring-4-sizing-kit-size-before-you-buy-ring)

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-08-21*