Take a photo of your hand with a standard-size card
Good lighting
Plain background
Spread fingers apart
Remove any rings
For best accuracy, measure at room temperature. Avoid measuring after exercise or in extreme cold.
No personal data is stored. Images are used solely for measurement.
Guide
Place your hand below the line with fingers spread
Card Calibration
Tap the top-left corner of your card (1 of 4)
Analyzing your hand...
This usually takes about 5 seconds
Detecting hand and card
Measuring proportions
Calculating ring size
Your Recommended Size
Sizes Recommended for your Halo Ring
Ring finger
9
Best fit
Based on your measurement, this size is the best match for you.
88%
Our rings run snug. We've already sized up for the perfect fit.
Help us improve
This AI sizer is in beta. If you know your size, let us know how we did:
Thanks for your feedback!
BETA · Session
Hand Not Detected
We couldn't detect your hand clearly. Try again with better lighting and a plain background.
Use Your Phone
The AI ring sizer requires a phone camera. Visit this page on your mobile device:
Or use our Free Sizing Kit for an at-home measurement.
We need access to motion
This way we ensure the photo is correct. Allow access on the following screen.
Loading AI model...
Select Size
We recommend sizing 1 full size up — our rings fit snug. Please ensure the selected ring size is comfortable before submitting. Once shipped out, the size cannot be changed.
Popular upgrades
🎁You've Been Randomly Selected!FREE
✨ Stackable Rings for your Halo Ring
A free gift bundle has been reserved for your session. Select sizes & add to cart before time runs out.
⏳ Offer expires in:10:00
Dainty Ring
Select your size, rings are adjustable
FREE
Angelica Ring
Select your size, rings are adjustable
FREE
Silicone Cover (Random Color)
Select your size
FREE
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Aerospace Grade Titanium
Built to the same rigorous standards
Best in Class Sensors
Monitoring your vitals with utmost accuracy
Zero Subscription Model
Unlike big brands, we don't charge monthly to access your health data
30-Day Money-Back Guarantee
Less than 0.5% of buyers ever use it — that's how confident we are
Pairs well with
File A Warranty Claim
At Halo Ring, we stand behind the quality of every product we ship. If your order arrives defective or experiences a covered issue within 30 days of delivery, you may be eligible for a replacement.
Our support team is here to help. We’ve recently upgraded and expanded our customer support system to provide faster response times and a smoother experience for all Halo Ring customers.
For the best fit, we recommend sizing up by one size from your usual ring size, based on the finger you plan to wear your Halo Ring on. Halo Ring is best worn on the index finger, which typically requires a slightly larger size than other fingers. Sizing up helps ensure comfort, accurate tracking, and all-day wear.
What comes with HaloCare+ Lifetime Warranty
Standard 30-Day Warranty (Included)
Every HALO Ring comes with a 30-day warranty that covers manufacturing defects and hardware issues under normal use.
Lifetime Warranty (Optional Upgrade)
Our Lifetime Warranty provides extended peace of mind and covers your HALO Ring beyond the initial 30 days, including protection against defects and functional issues for as long as you own the ring. This option is recommended for long-term wear and daily use.
The HALO Lifetime Warranty provides extended protection beyond the standard 30-day warranty and includes:
Coverage for manufacturing defects for the lifetime of the product
Hardware malfunctions under normal, intended use
Functional failures related to internal components
Replacement support if the ring stops functioning due to covered issues
Priority warranty assistance through our support team
Is there a subscription for HALO Ring?
No — HALO Ring does not require a subscription.
All features are included with your purchase, and the HALO app is completely free to use. You’ll have full access to health insights, tracking, and updates with no monthly fees or hidden costs.
You pay once for just the ring and enjoy lifetime access.
Shipping Information
We offer free worldwide shipping on all orders.
Processing time: 1 to 2 working days Shipping time: 3 to 5 working days.
We offer a stress-free 30-day return policy to ensure your satisfaction. If you’re not completely happy with your purchase, you can return it within 30 days.
For more in depth shipping times, please click here
Want to learn more about how our app works? We’ve created a full guide that walks you through all the features, setup steps, and tips to get the most out of your experience. From syncing your device to customizing your settings, you’ll find everything you need in one place.
Because your body deserves better insight — HALO Ring 3.
Health Insights That Go Beyond the Surface
Every detail of Halo Ring is designed to fit seamlessly into your life—delivering insights that empower healthier choices every day.
88You're in a good mood
Menstrual Cycle Tracking
Track your cycle with greater insight using Halo’s menstrual tracking features
92Excellent
Sleep & Recovery
Track your sleep stages and nightly recovery—helping you wake up refreshed and ready.
0006121824
Activity
Every step, every stride, every session — Halo tracks it all. Monitor steps, calories,
96Excellent
Stress & Wellness Tracking
Halo detects elevated stress levels and offers guided breathing and mindfulness exercises for balance throughout the day.
84BPM
Avg. Heart Rate
Heart Rate & HRV
Stay connected to your heart’s rhythm with real-time BPM tracking and easy-to-read graphs.
91Excellent
Blood Oxygen
Stay in sync with your body. Halo tracks your blood oxygen levels to reveal how well you’re performing and recovering
Discover Our Features and Benefits
Learn more about what makes HALO fit your lifestyle.
Sync With Your Cycle
Sync With Your Cycle
Your body shifts throughout the month — your ring helps you stay in tune with every phase.
With advanced temperature trends, readiness changes, and sleep patterns, you gain clearer insight into your hormones without manual tracking. Feel more aligned, more prepared, and more empowered every day.
Key Benefits
Cycle Awareness
Track cycle phases to better understand your body’s natural rhythm.
Daily Body Insights
See how changes in temperature and recovery patterns relate to your cycle.
Smarter Self-Care
Adjust rest, activity, and wellness routines to align with how your body feels each day.
Sleep Analysis
Sleep Analysis
Great sleep is the foundation of healthy skin, balanced mood, and daily performance.
HALO Ring tracks your sleep stages, nighttime temperature, and overnight recovery to give you deeper insight into how your body truly rests.
With personalized insights, you can build better nighttime routines, wake up feeling energized, and support a natural glow from within — starting with better sleep.
Key Benefits
Deeper Sleep Insights
Track sleep stages, duration, and quality to understand how well your body truly rests.
Smarter Wake-Ups
Identify patterns that help you wake up feeling refreshed, energized, and clear-headed.
Rest That Supports Recovery
See how sleep impacts your recovery, stress levels, and overall performance.
Stress & Calmness Monitoring
Stress & Calmness Monitoring
Life can get overwhelming — HALO Ring helps you stay grounded. By tracking real-time heart rate trends and recovery signals, your ring reveals when your body is under stress and when it needs rest.
With clearer insight into how daily moments impact your nervous system, you can take proactive steps to prevent burnout, improve emotional balance, and feel more in control throughout your day.
HALO’s wellness insights help you recognize stress patterns, support guided recovery, and build healthier routines that promote long-term calm and resilience.
Key Benefits
Calm Alerts
Spot stress spikes in real time so you know when your body needs a pause.
Guided Recovery
Personalized breathing and rest suggestions help your body reset throughout the day.
Emotional Awareness
Understand how daily habits, work, and rest affect your mood and overall wellbeing.
Daily Body Alerts
Daily Body Alerts
Your body gives signals long before burnout sets in — HALO Ring helps you recognize them. By monitoring recovery trends, heart rate patterns, and daily strain, your ring provides a clearer picture of when your body is energized, fatigued, or under stress.
These insights help you avoid overload, support smarter training, and build healthier balance between movement and recovery.
With HALO, you can listen to your body, protect your energy, and stay consistent without pushing too far.
Key Benefits
Body Load Awareness
Monitor recovery signals and daily strain to understand when your body is under stress.
Prevent Overload
Spot signs of fatigue early so you can avoid pushing too hard and reduce burnout.
Train & Recover Smarter
Balance activity and rest with insights that support long-term performance and wellbeing.
$0 Subscriptions.
Say goodbye to monthly fees. Your HALO Ring includes full access to the entire app — sleep tracking, readiness scoring, temperature trends, stress insights, activity tracking, and more. No paywalls, no hidden upgrades, no “premium” tiers.
Just one smart ring and 100% free lifetime app access designed to support your health, your cycle, and your routine without charging you every month.
Included with every Halo order.
Halo Ring
USB Ring Charging Cable
90 Day Warranty (Upgradable to Lifetime)
Wireless Fast Charging Case (Sold Separately)
Tech Specifications
Sensors
Red and infrared LEDs measure blood oxygen levels
Green and infrared LEDs alternate to measure heart rate and heart rate variability 24/7 and respiration rate
Digital sensor measures temperature trends
Accelerometer tracks movement and activity 24/7
Battery Life
5-8 days of battery life
Typically charges in 20-80 minutes, depending on battery level
Quality Materials
Non-allergenic titanium on inner & outer surfaces
Seamless titanium interior
Water resistant up to 100m/328 ft
Minor scratches from regular wear are normal
Connectivity
Bluetooth Low Energy
Automatic firmware updates via App
EMF-safe
Supports airplane mode
FCC-certified
FAQs
How does the Halo Ring track my health?
The Halo Ring uses built-in sensors to measure heart rate, sleep quality, recovery levels, calories burned, and daily activity. All data syncs automatically to the Halo app for real-time insights and personalized recommendations.
Is the Halo Ring waterproof?
Yes — the Halo Ring is fully waterproof and safe for:
✔ Showers
✔ Hand washing
✔ Sweat & workouts
✔ Rain
(Just avoid prolonged high-heat steam rooms.)
How long does the battery last?
The Halo Ring lasts 5–7 days on a full charge depending on usage.
Charging takes 60–90 minutes using the included magnetic charger.
How do I know which ring size to choose?
You can refer to this page here to help get your correct sizing.
Yes — it’s designed for 24/7 comfort. It’s lightweight, slim, and smooth enough to wear while sleeping, lifting, running, or working.
Does the Halo Ring require a subscription?
No subscription is required.
You get full access to all core tracking features without monthly fees.
How accurate is the Halo Ring?
The ring uses advanced photoplethysmography (PPG) sensors and motion tracking tech comparable to top smartwatch brands — but in a smaller, more comfortable form factor.
Choosing a selection results in a full page refresh.
Halo Ring
