---
product_id: 645829956
title: "ULTRAHUMAN Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring"
brand: "ultrahuman"
price: "NT$104"
currency: TWD
in_stock: true
reviews_count: 8
category: "Ultrahuman"
url: https://www.desertcart.tw/products/645829956-ultrahuman-ring-air-sizing-kit-choose-from-sizes-5-14
store_origin: TW
region: Taiwan
---

# Multi-biomarker health tracking 10 precise sizes (5-14) 6-day battery life ULTRAHUMAN Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring

**Brand:** ultrahuman
**Price:** NT$104
**Availability:** ✅ In Stock

## Summary

> ⌚ Size it right, track it tight — your health, redefined.

## Quick Answers

- **What is this?** ULTRAHUMAN Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring by ultrahuman
- **How much does it cost?** NT$104 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/645829956-ultrahuman-ring-air-sizing-kit-choose-from-sizes-5-14)

## 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

- • **Subscription-Free Power:** Unlock full health tracking features on the Ultrahuman App with zero subscription fees.
- • **Women’s Health, Elevated:** Cycle, ovulation, and pregnancy insights powered by multi-biomarker data for personalized wellness.
- • **Perfect Fit, Zero Guesswork:** Exclusive sizing kit ensures your Ultrahuman Ring AIR fits flawlessly—no returns, no hassle.
- • **Sleep Smarter, Perform Better:** Advanced sleep stage analysis and actionable nudges to optimize your rest and daily energy.
- • **All-in-One Health Command Center:** Track sleep, stress, heart health, workouts, and recovery with clinical-grade precision.

## Overview

The ULTRAHUMAN Ring AIR Sizing Kit offers 10 distinct sizes (5-14) to guarantee a perfect fit for this cutting-edge smart ring. Designed with titanium and powered by a 6-day battery, the ring delivers comprehensive health tracking including sleep stages, heart metrics, stress, activity, and advanced women’s health insights—all accessible via a no-subscription Ultrahuman App. This sizing kit eliminates guesswork, ensuring you get the right ring size before purchase, enhancing your wearable experience and minimizing returns.

## Description

ULTRAHUMAN Ring AIR Sizing Kit | Choose from Sizes 5-14 | Sizing Guide for Your Smart Wearable Ring : desertcart.co.uk: Sports & Outdoors

Review: best smart ring on the market! - best investment of 2025! looks and feels amazing on, very functional - you can track so much on it in real time. especially good if you struggle with sleep as it gives you detailed insights. i managed to get it on a black friday deal (£232) so the value for money was amazing! only con of this ring is that it does scratch easily but this can be mitigated by getting a cover for it.
Review: Great product. - I am happy with the functionality of this ring. The stats mirror fairly closely to my Apple Watch in terms of sleep. Steps are not at all accurate though. The app provides lots of information, which I love, although it could be overwhelming for some. That said, it breaks it down well and gives some well presented information The ring is well made and solid, and looks good. So far I am very happy with the product.

## 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 | 538 in Fashion ( See Top 100 in Fashion ) 6 in Ring Sizers |
| Box Contents | Charging Dock, Type C to Type C Cable, Ultrahuman Ring AIR |
| Brand Name | ULTRAHUMAN |
| Case Material Type | Plastic |
| Clasp Type | Ring |
| Colour | Sizing Kit |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone, Tablet, Computer |
| Compatible Phone Models | All Smartphone Models |
| Connectivity Technology | Bluetooth, USB |
| Connectivity technology | Bluetooth, USB |
| Controller Type | Ultrahuman Application |
| Country of Origin | India |
| Customer Reviews | 4.1 out of 5 stars 1,336 Reviews |
| Display Type | No Display |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Buttons |
| Item Dimensions | 32 x 116 x 194 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-UK |
| 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 |
| 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

![ULTRAHUMAN 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)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ best smart ring on the market!
*by D***G on 6 December 2025*

best investment of 2025! looks and feels amazing on, very functional - you can track so much on it in real time. especially good if you struggle with sleep as it gives you detailed insights. i managed to get it on a black friday deal (£232) so the value for money was amazing! only con of this ring is that it does scratch easily but this can be mitigated by getting a cover for it.

### ⭐⭐⭐⭐⭐ Great product.
*by R***Y on 7 January 2026*

I am happy with the functionality of this ring. The stats mirror fairly closely to my Apple Watch in terms of sleep. Steps are not at all accurate though. The app provides lots of information, which I love, although it could be overwhelming for some. That said, it breaks it down well and gives some well presented information The ring is well made and solid, and looks good. So far I am very happy with the product.

### ⭐⭐⭐⭐ Brilliant product
*by M***W on 1 January 2026*

Battery life is very convenient and lasts a few days before needing charging. Tracks sleep very well and provides useful information and ways to improve. Would definitely recommend

## 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.tw/products/645829956-ultrahuman-ring-air-sizing-kit-choose-from-sizes-5-14](https://www.desertcart.tw/products/645829956-ultrahuman-ring-air-sizing-kit-choose-from-sizes-5-14)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-02-07*