---
product_id: 645829956
title: "Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring"
brand: "ultrahuman"
price: "€ 0.51"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ultrahuman"
url: https://www.desertcart.pt/products/645829956-ring-air-sizing-kit-choose-from-sizes-5-14-sizing
store_origin: PT
region: Portugal
---

# 2-hour fast charge 10 precise sizes (5-14) Bluetooth & app sync Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring

**Brand:** ultrahuman
**Price:** € 0.51
**Availability:** ✅ In Stock

## Summary

> 📏 Nail your perfect fit, then own your health journey with Ultrahuman Ring AIR!

## Quick Answers

- **What is this?** Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring by ultrahuman
- **How much does it cost?** € 0.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/645829956-ring-air-sizing-kit-choose-from-sizes-5-14-sizing)

## Best For

- ultrahuman enthusiasts

## Why This Product

- Trusted ultrahuman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleep Like a Pro:** Unlock detailed REM, deep, and light sleep analysis plus actionable nudges to optimize your rest and recovery.
- • **Cycle & Pregnancy Insights:** Empower women with biomarker-driven ovulation, cycle, and trimester tracking for personalized wellness.
- • **Subscription-Free Wellness:** Access essential health metrics and insights on the Ultrahuman App with no hidden fees or subscriptions.
- • **Perfect Fit, Zero Guesswork:** Avoid returns with the Ultrahuman Ring AIR Sizing Kit—get your exact size first time.
- • **All-in-One Health Command Center:** Track sleep, stress, heart health, workouts, and recovery seamlessly in one sleek ring.

## Overview

The Ultrahuman Ring AIR Sizing Kit ensures you select the perfect ring size from 10 options (5-14) before purchasing the smart wearable ring. Designed for comprehensive health tracking, the ring monitors sleep stages, heart health, stress, activity, and recovery, with advanced women's health features including cycle and pregnancy tracking. It pairs via Bluetooth with the Ultrahuman App, offering subscription-free access to essential wellness insights. Fast 2-hour charging and a lightweight titanium build make it a seamless addition to your daily health routine.

## Description

Product Description Ultrahuman Ring AIR Understand Your Sleep Quality & Quantity Understand Your Day-to-Day by Cycle Tracking Decode How Your Body Responds to Stress Know When to Push or When to Pause Track Your Journey of Pregnancy Week-by-Week

Review: Great - These are great value for money Light weight Accurate to size Great quality
Review: Cheap and accurate - Absolutely spot on, arrived in less than 24 hours and gave me my correct size for less than a quid!

## Features

- BUY THE SIZING KIT FIRST: Ultrahuman Ring sizes differ from standard ring sizes. Purchase the Ultrahuman Sizing Kit first, which includes a ring sizer, to accurately determine your size. The Ring AIR is available in 10 sizes (5-14), ensuring a comfortable, secure fit. Using the sizing kit helps you avoid returns and exchanges, ensuring you select the right size before purchasing.
- COMPREHENSIVE HEALTH TRACKING: The Ultrahuman Ring measures a wide range of metrics including sleep, activity, stress, heart health, movement, workouts, and recovery. Stay on top of your health and fitness goals with detailed insights to optimize your performance and well-being.
- WOMEN’S HEALTH INSIGHTS: With Ultrahuman Ring's advanced women's health features, track ovulation, cycles and pregnancy. Through multi-biomarker-based tracking for those looking to conceive, predict a 7-day fertile window and pinpoint ovulation with precision. Access cycle tracking combined with biomarker-based personalized guidance for every phase (Menstruation, Ovulation, Follicular, and Luteal). With Pregnancy Mode, expecting mothers get tailored pregnancy insights throughout each trimester.
- ONE APP, NO SUBSCRIPTION: Enjoy all the essential standard features of the Ultrahuman Ring, including sleep, activity, stress, heart rate, heart rate variability, skin temperature and recovery with no subscription — on the Ultrahuman App.
- ADVANCED SLEEP TRACKING: Ultrahuman Ring provides detailed insights into all your sleep stages — REM, Deep Sleep, Light Sleep and Wakefulness, along with actionable steps and nudges to improve sleep so you're ready for the day. It also tracks sleep debt, helping you understand your overall sleep quality and identify areas for improvement. Optimize your rest and recovery with accurate, personalized sleep insights.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D796MGRS |
| Age Range Description | Adult |
| Band Colour | Black |
| Band Material Type | Titanium |
| Battery Average Life | 6 days |
| Battery Capacity | 24 Milliamp Hours |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 2 Hours |
| Battery Power | 24 Milliamp Hours |
| Battery capacity | 24 Milliamp Hours |
| Best Sellers Rank | 560 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 3 in Wearable Tech Rings |
| Box Contents | Charging Dock, Type C to Type C Cable, Ultrahuman Ring AIR |
| Brand Name | ULTRAHUMAN |
| Case Material Type | Plastic |
| Clasp Type | Ring |
| Closure Type | Ring |
| Colour | Sizing Kit |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone, Tablet |
| Compatible Phone Models | All Smartphone Models |
| Connectivity Technology | Bluetooth, USB |
| Connectivity technology | Bluetooth, USB |
| Controller Type | Ultrahuman Application |
| Country of Origin | India |
| Customer Reviews | 4.5 out of 5 stars 994 Reviews |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Buttons |
| Item Dimensions | 16 x 8 x 16 millimetres |
| Item Weight | 40 Grams |
| Manufacturer | Ultrahuman Healthcare Pvt Ltd |
| Memory Storage Capacity | 0.5 MB |
| Memory storage capacity | 0.5 MB |
| Metrics Measured | Sleep Duration, Step Count |
| Model Name | Ultrahuman Ring AIR |
| Model Number | UHRA-SSK-JP-FBA |
| Operating System | Ultrahuman App |
| Product Features | Activity Tracker, Custom Activity Tracker, Cycle Tracking, Multisport Tracker, Sedentary Reminder |
| Product Warranty | 1 Year |
| Shape | Round |
| Special feature | Activity Tracker, Custom Activity Tracker, Cycle Tracking, Multisport Tracker, Sedentary Reminder |
| Sport Type | Cycling, Fitness, Multi-Sports, Swimming, Yoga |
| Style Name | Sizing Kit |
| Supported Application | Fitness Tracker |
| Target Audience | Unisex Adults |
| Unit Count | 1.0 count |
| Warranty Type | Limited |
| Water Resistance Depth | 100 Metres |
| Water Resistance Level | Not Water Resistant |
| Waterproof Rating | IPX8 |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless communication standard | Bluetooth |

## Product Details

- **Battery capacity:** 24 Milliamp Hours
- **Battery cell composition:** Lithium Polymer
- **Brand:** ULTRAHUMAN
- **Connectivity technology:** Bluetooth, USB
- **GPS:** No GPS
- **Memory storage capacity:** 0.5 MB
- **Operating system:** Ultrahuman App
- **Shape:** Round
- **Special feature:** Activity Tracker, Custom Activity Tracker, Cycle Tracking, Multisport Tracker, Sedentary Reminder
- **Wireless communication standard:** Bluetooth

## Images

![Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring - Image 1](https://m.media-amazon.com/images/I/81UQzOLIkwL.jpg)
![Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring - Image 2](https://m.media-amazon.com/images/I/717cdPwR5uL.jpg)
![Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring - Image 3](https://m.media-amazon.com/images/I/81bzA756mNL.jpg)
![Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring - Image 4](https://m.media-amazon.com/images/I/71R8g2YEUpL.jpg)
![Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring - Image 5](https://m.media-amazon.com/images/I/81Zs2jMdEOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great
*by K***N on 5 June 2026*

These are great value for money Light weight Accurate to size Great quality

### ⭐⭐⭐⭐⭐ Cheap and accurate
*by M***N on 15 July 2026*

Absolutely spot on, arrived in less than 24 hours and gave me my correct size for less than a quid!

### ⭐⭐⭐⭐⭐ Variable Sizes
*by K***N on 1 July 2026*

Very good cheap and easy measuring kit. Can’t go wrong with this. Has a good range of sizes so you can find your perfect fit.

## Frequently Bought Together

- ULTRAHUMAN Ring AIR - Sleep & Fitness Tracker, Smart Ring for Women & Men, No App Fee for Standard Features
- RingConn Gen 2 Sizing Kit - Size First Before You Buy - Choose from 9 Sizes - Sizes 6 to 14 - Find The Perfect Ring Size Smart Ring Size
- Oura Ring 4 Sizing Kit - Size Before You Buy Oura Ring 4 - Unique Sizing - Receive Credit for Purchase

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**Shop now:** [https://www.desertcart.pt/products/645829956-ring-air-sizing-kit-choose-from-sizes-5-14-sizing](https://www.desertcart.pt/products/645829956-ring-air-sizing-kit-choose-from-sizes-5-14-sizing)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-08-01*