CUDIS 002 Classic Ring — Smart Ring for Sleep & Recovery Tracking
*Every CUDIS 002 Classic Ring includes a one-year warranty with replacement support for verified product issues upon return.
Add ons
Add one more year of warranty
🚚 Shipping: US 3-5 Days | International 2-4 Weeks.
| Size | Circumference (mm) | Diameter (mm) | US | UK/AUS | ITALY | KR | JP | FR | DE |
|---|---|---|---|---|---|---|---|---|---|
| 6 | 51.9 | 16.5 | 5.5,6 | M | 12 | 12 | 12 | 52 | 16.5 |
| 7 | 54.5 | 17.3 | 6.5,7 | N,O | 13,14.5 | 14,15 | 13,14 | 53,54.5 | 17,17.25 |
| 8 | 57 | 18.1 | 7.5,8 | P,Q | 16,17 | 16,17.5 | 15,16 | 56,57 | 17.75,18 |
| 9 | 59.5 | 18.9 | 8.5,9 | R,S | 18.5,19.75 | 18.75,20 | 17,18 | 58.5,59.5 | 18.5,19 |
| 10 | 62.1 | 19.8 | 9.5,10 | T,T½ | 21,22.25 | 21,22.25 | 19,20 | 61,62.5 | 19.5,20 |
| 11 | 64.6 | 20.6 | 10.5,11 | U½,V½ | 23.5,25 | 24,25.25 | 22,23 | 63.5,65 | 20.25,20.75 |
| 12 | 67.2 | 21.4 | 11.5,12 | X¾,Y | 26,27.5 | 26.25,27.75 | 24,25 | 66,67.5 | 21,21.25 |
| 13 | 69.7 | 22.2 | 12.5,13 | Z,Z+1 | 28.75,30 | 29,30.25 | 26,27 | 67,70 | 21.75,22 |
| 14 | 72.5 | 23.1 | 13.5,14 | Z+3 | 32 | 32 | 28 | 72.5 | 23 |
If you are between sizes, opt for the larger size.
*Don't know which size to choose? Share your finger circumference with a CUDIS advisor for expert help.
[Contact Support: support@cudis.xyz]
1.Use a flexible measuring tape or length of string. Wrap it around the finger you'll wear your ring on - if you're creating a ring stack, consider where on your finger the ring will sit. If using string, mark the point on the string where the ends meet with a pen.
2.Lay the string on a flat surface and use a ruler to measure the length (in inches or millimeters) up to the mark. Compare your measurement to the size chart above to determine your ring size. If you are between sizes, opt for the larger size.
A helpful method if you're surprising someone with a gift or treating yourself.
1.Choose a ring that already fits your finger well.
2.Measure the interior diameter of the ring in millimeters (mm).
3.Use the measurement chart above to match the size of your ring to the closest size in mm. The interior of the ring should align with the outer edge of the circle.
Ring Ordering Guide
Diameter 16.5mm
If you are between sizes, opt for the larger size.
*Don't know which size to choose? Share your finger circumference with a CUDIS advisor for expert help. [Contact Support: support@cudis.xyz]
1.Use a flexible measuring tape or length of string. Wrap it around the finger you'll wear your ring on - if you're creating a ring stack, consider where on your finger the ring will sit. If using string, mark the point on the string where the ends meet with a pen.
2.Lay the string on a flat surface and use a ruler to measure the length (in inches or millimeters) up to the mark. Compare your measurement to the size chart above to determine your ring size. If you are between sizes, opt for the larger size.
A helpful method if you're surprising someone with a gift or treating yourself.
1.Choose a ring that already fits your finger well.
2.Measure the interior diameter of the ring in millimeters (mm).
3.Use the measurement chart above to match the size of your ring to the closest size in mm. The interior of the ring should align with the outer edge of the circle.
Live Smarter, Recover Better
Based on the statistics from our existing 30,000+ ring users, Daily CUDIS wear is linked to 15 more hours of Deep Sleep per month, 6 more hours of monthly sports activity, 15% higher vitality, and 30% less chance of getting injury.
Recovery
Understand your body’s readiness for the day by seeing how well you’ve recharged from previous physical demands.
Vitals tracking
Monitor your key biometric signals for a comprehensive 24/7 overview of your health.
Sleep
Analyze your sleep stages and quality to understand how your body rests and wake up feeling truly refreshed.
Activity
Track over 50 different activities - from running and skiing to rock climbing, and even everyday movements like walking your dog!
Stress
Identify how your body responds to daily pressures by tracking physiological changes throughout the day.
CUDIS age
Discover your biological health status by comparing your body’s internal data to your actual chronological age.
AI Coach
Receive personalized, data-driven guidance and actionable health tips tailored to your unique lifestyle and goals.
Strain
Measure the physical exertion placed on your body to help you balance intensity with rest.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
Designed for the Quiet Moments That Matter — Sleep, Recovery & Focus
A Sleep Ring Built for Overnight Comfort
CUDIS 002 Classic is designed for lightweight all-night wear with minimal distraction, providing continuous sleep and recovery tracking throughout every sleep cycle, so you can monitor your overnight health without interrupting comfort.
Stay Focused. Stay Balanced
Monitor stress and energy trends throughout the day with a recovery ring designed to support productivity and mental clarity.
A Minimalist Smart Ring for Everyday Use
CUDIS 002 Classic offers a screenless wearable experience designed to reduce distractions and keep you connected to your health data in a calm, unobtrusive way.
Effortless All-Day Comfort
At just 3 grams, CUDIS 002 Classic is designed for all-day and all-night wear, making it one of the most comfortable lightweight smart ring options for continuous health tracking.
CUDIS 002 Classic is designed for lightweight all-night wear with minimal distraction, providing continuous sleep and recovery tracking throughout every sleep cycle, so you can monitor your overnight health without interrupting comfort.
Monitor stress and energy trends throughout the day with a recovery ring designed to support productivity and mental clarity.
CUDIS 002 Classic offers a screenless wearable experience designed to reduce distractions and keep you connected to your health data in a calm, unobtrusive way.
At just 3 grams, CUDIS 002 Classic is designed for all-day and all-night wear, making it one of the most comfortable lightweight smart ring options for continuous health tracking.
Sleep Better, Stay Focused, Live Effortlessly With Sleep Tracking & Recovery Insights
Premium Titanium Build
Crafted from lightweight titanium for durability, comfort, and everyday versatility, designed to deliver a more reliable titanium smart ring experience for long-term use.
Ultra-Light Comfort
At just 3 grams, CUDIS 002 Classic is designed for 24/7 continuous wear, staying lightweight and comfortable throughout the day and night. It performs especially well as a sleep tracking ring, delivering consistent overnight comfort and reliable sleep and recovery monitoring without feeling intrusive on your finger.
Smart Health Tracking
This sleep tracker ring helps users track sleep, stress, and recovery patterns in a simple, wearable format designed for everyday health awareness.
No Subscription Required
Everything is included with no monthly fee, making CUDIS 002 Classic a sleep tracking ring and smart ring sleep tracker with full long-term functionality and no recurring subscription costs.
Which Ring is Right for You?
Price
$239.00
Price
$399.00
Color
Color
Design
Refined, minimal form with a quiet presence. Built to blend into daily wear with a clean, timeless profile.
Design
Bold, adaptable look with interchangeable color shells. Built for movement, variation, and high-energy use.
Weight
3g
Weight
3g
Material
Full titanium construction. Smooth, durable, and premium to the touch.
Material
Titanium core with abrasion-resistant silicone outer band. Flexible, impact-tolerant, and suited for training conditions.
CUDIS Sporty Ring
Your personal wellness sentinel, precision-crafted from aerospace-grade titanium for exceptional strength, timeless elegance, and remarkable lightness.
Charging Pod
Your personal wellness sentinel, precision-crafted from aerospace-grade titanium for exceptional strength, timeless elegance, and remarkable lightness.
Type C Wire
The refined connection between your ring's ecosystem and modern convenience, enabling seamless power delivery through universal compatibility.
FAQs
What is the average shipping time?
2–4 weeks depending on the destination, with delivery in under 2 weeks for Asia and the US.
Can I change my delivery address?
For orders that haven’t shipped yet, please contact us at support@cudis.xyz.
How can I track my order?
After you place your order, we’ll send you a confirmation email with your order details. Once your order ships, you’ll receive a separate shipping confirmation email that includes a tracking link.
Excellent product, easy to used, 100 % recommended
The ring works not too bad but it's the shipping that's trash every product I bought from these guys it's taken 2 to 3 months longer
Good
It's good
That’s amazing — stylish and good for your health!
The product is well-finished and effectively supports various types of training. However, the sleep tracking feature could be further improved to provide more accurate results and enhance the overall user experience.
I had great customer service. My ring fits and use it every day. Matches my gold jewelry and is so light i sometimes forget its on. Tracks my steps and exercises. Very satisfied. Thanks Cudis.
It's a great product, love everything about it
The ring is great, comfortable to wear. I've only been using it for a few days and I'm thrilled. It would be great if you could also change the language setting to German.
All fine so far
Ring fits well, sizing guide is accurate, metrics are all good. Only complaint is I feel like there could maybe be some more items in the app, a way for rewards to not be in Malaysia, and the shipping is odd. It was very confusing.
Good experience with support when I needed to change the sizing, they were able to accommodate before it shipped. I’m happy they did because it fits perfectly (size 12). This type of project is the future of holistic health and I’m looking forward to digitally incentivizing my health and fitness.
Loving it!
Great tech, taken it swimming, biking and walking all without issues. Info is great, I think the rewards will be below average though.
I wish it was more accurate. And that it tracked calories all the time.
着け心地もいい。身体の状態を数値を見る事ができるのは嬉しい
Excelente servicio, atenció, paciencia, ojalá que todas las empresas tuvieran un personal de primera como CUDIS, continúen así, trabajando por la excelencia en el servicio al cliente, mis FELICITACIONES
It won't work for me
Great product, free from subscription and so much room to grow. I used for two weeks and already my ring scratched, and it looks like it was painted rather made from actual material which doesn’t very looks prestige. That’s the only caviat all the rest is sound
Fantastic Product
So far so good, app is easy to use. The main thing I don't like about it is I wear the ring on the same arm as my x watch(crypto smart watch) and my steps don't match.
Very cool and slick design when you first saw it and definitely want to see what it can do for my first time trying it out.
I received the ring. I can't really say much yet. The ring fits perfectly. The only problem I ran into is finding the correct wall charger so the ring can be changed. I can give you another review after I get this part figured out.
I bought the ring mainly for the approach of being rewarded for our health data and the full privacy that it offers. This is unmatched and other rings usually require a subscription.
That said, the technology itself still needs to mature as I experienced several disconnections and also the monitored data doesn't seem to be as accurate as other devices especially for heart rate (too few data points during the day) and sleep (quite optimistic on deep and REM sleep).
I hope these will improve with future firmware updates.
So far, I'm happy.
Good job
Great ring not worth the price
NICE!
本体がシンプルで良い。シンプルな分厚みが薄いのも良かったです。
001,スポーツリングはサイズ13で、今回12にしたのですがサイズが丁度良かったです。
Cudis has changed my life from inactive to active
Love it, Love it...