---
product_id: 661191227
title: "Ring 4 Sizing Kit - Before You Buy the Unique Sizing, Not Standard US Sizes - Receive Credit for Purchase, Sizing Kit, Oura App"
brand: "oura"
price: "S$16"
currency: SGD
in_stock: true
category: "Oura"
url: https://www.desertcart.sg/products/661191227-ring-4-sizing-kit-before-you-buy-the-unique-sizing
store_origin: SG
region: Singapore
---

# Optimizes data accuracy & comfort Custom sizing kit for perfect fit Reusable sizing for multiple fingers Ring 4 Sizing Kit - Before You Buy the Unique Sizing, Not Standard US Sizes - Receive Credit for Purchase, Sizing Kit, Oura App

**Brand:** oura
**Price:** S$16
**Availability:** ✅ In Stock

## Summary

> 📏 Nail your fit, unlock your health insights with Oura Ring 4 Sizing Kit!

## Quick Answers

- **What is this?** Ring 4 Sizing Kit - Before You Buy the Unique Sizing, Not Standard US Sizes - Receive Credit for Purchase, Sizing Kit, Oura App by oura
- **How much does it cost?** S$16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/661191227-ring-4-sizing-kit-before-you-buy-the-unique-sizing)

## 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

- • **Wear It Your Way:** Fits any finger on either hand—tailor your wellness tech to your style and comfort.
- • **Smart Credit Bonus:** Sizing kit purchase applies a $10 credit toward your Oura Ring 4—invest in confidence.
- • **Maximize Your Metrics:** A perfect fit means the highest accuracy in heart rate, activity, and sleep tracking.
- • **Water-Ready & Durable:** Crafted with stainless steel and water resistance up to 100 meters for everyday resilience.
- • **Precision Fit, Zero Guesswork:** Custom sizing kit ensures your Oura Ring 4 fits flawlessly—no standard sizes here.

## Overview

The Oura Ring 4 Sizing Kit is a precision tool designed to help you find the perfect fit for the Oura Ring 4, which uses unique sizing different from standard rings. Ensuring the right size maximizes comfort and the accuracy of health metrics like heart rate, activity, and sleep monitoring. Compatible with all fingers and hands, the kit also grants a $10 credit toward your ring purchase, making it an essential step before buying this top-ranked smart ring.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D9WVWXR1 |
| Additional Features | Heart Rate Monitor, Activity Tracker, Sleep Monitor |
| Band Material Type | Stainless Steel |
| Best Sellers Rank | #110 in Electronics ( See Top 100 in Electronics ) #2 in Smart Rings |
| Brand | OURA |
| Built-In Media | Oura Ring 4 Sizing Kit |
| Cellular Technology | Not Supported |
| Closure Type | Push Back |
| Color | Sizing Kit |
| Compatible Devices | Smartphone |
| Customer Reviews | 4.5 4.5 out of 5 stars (3,660) |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Manufacturer | Oura |
| Model Number | JZ98-54870 |
| Shape | Round |
| Style Name | Sizing Kit |
| Supported Application | Fitness Tracker, Sleep Monitor |
| 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
- **Display Type:** No Display
- **GPS:** No GPS
- **Shape:** Round
- **Special Feature:** Heart Rate Monitor, Activity Tracker, Sleep Monitor
- **Style:** Sizing Kit
- **Water Resistance Level:** Water Resistant

## Images

![Ring 4 Sizing Kit - Before You Buy the Unique Sizing, Not Standard US Sizes - Receive Credit for Purchase, Sizing Kit, Oura App - 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.sg/products/661191227-ring-4-sizing-kit-before-you-buy-the-unique-sizing](https://www.desertcart.sg/products/661191227-ring-4-sizing-kit-before-you-buy-the-unique-sizing)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-06-22*