CUDIS 002 Classic Ring Is a Smart Ring for Sleep That Tracks Recovery, Stress, and Daily Wellness in Lightweight Titanium

Need help?

Get a free sizing kit with your order and size at home.

CUDIS ring sizes differ from other standard rings and other smart ring brands. To find your correct size, please use our CUDIS Free Sizing Kit by following the steps right:

Step 1:Order your CUDIS Ring

Not sure about your size? Select “Don't know my size” when placing your order. We'll send you a free Sizing Kit first, and your CUDIS Ring will ship after you confirm your size.

Step 2:Sizing Kit delivery

We'll ship your free Sizing Kit first so you can find the right fit at home. Delivery times may vary depending on your location.

Step 3:Find your size

Try the sample rings on your preferred finger and wear your best-fitting size throughout the day. Your CUDIS Ring should feel snug and secure, without being too tight.

Step 4:Get your CUDIS Ring

Once you've found your size, follow the link in our email to confirm it. We'll then prepare and ship your CUDIS Ring in your selected size.

Size Guide
Size	Circumference (mm)	Diameter (mm)	US	UK/AUS	ITLY	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,T1/2	21,22.25	21,22.25	19,20	61,62.5	19.5,20
11	64.6	20.6	10.5,11	U1/2,V/2	23.5,25	24,25.25	22,23	63.5,65	20.25,20.75
12	67.2	21.4	11.5,12	N3/4,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

Product Details

Benefits

Designed for Lightweight, Everyday Wear

Lightweight titanium design
Minimal, low-profile appearance
Designed for day-and-night wear
Built around sleep, recovery, and daily wellness tracking
Core health insights without a monthly subscription

Shipping

Free Shipping on CUDIS Classic

A refined smart ring designed to help you understand sleep, recovery, stress, and long-term health.

Estimated Delivery Times

United States: 3–7 business days

International: 15–30 business days for supported destinations

Delivery times are estimates and may vary due to customs processing, local carrier conditions, or other factors outside CUDIS's control.
Once your order ships, you will receive a shipping confirmation email with tracking information.
If you need to change your shipping address, ring size, or other order details, please contact support@cudis.xyz as soon as possible. Changes can only be made before the order has entered processing or been shipped.

Warranty

1-Year Limited Warranty

Every CUDIS 002 Classic includes a one-year limited warranty starting from the date of delivery.

The warranty covers eligible hardware issues arising under normal intended use, including:

Functional hardware defects
Manufacturing faults
Hardware failures under normal usage conditions

To request warranty support, contact support@cudis.xyz with your order number, purchase email address, and photos or videos showing the issue.

Good to Know Before You Buy

Sizing Matters

For the best tracking and wearing experience, the ring should fit securely without feeling overly tight. If you are unsure about your size, we recommend using a CUDIS Sizing Kit before selecting your final ring size.

Battery Life Varies by Use

Actual battery performance may vary depending on feature usage, tracking frequency, environmental conditions, battery age, and other factors.

30-Day Returns & Exchanges

If your CUDIS Classic is not the right fit, you may request a return or exchange within 30 calendar days of delivery, subject to the CUDIS Refund Policy.