RingConn Sizing Kit - Size First Before You Buy - Choose from 9 Sizes - Sizes 6 to 14 - Find The Perfect Ring Size Smart Ring Size - Only Compatible Smart Ring
Condition: New
Buy Now, Pay Later
As low as
$1
/ mo
Learn more
- – 4-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 2 left in stock, order soon!
Arrives
Sunday, Feb 22
Recently Viewed
Color: Sizing Kit
Size: 6-14
Features
- [Not Standard Sizing] RingConn Smart Ring differs from standard rings as it contains sensors on the inside. Therefore, we recommend using the RingConn Sizing Kit to determine the best fit. The RingConn Smart Ring is available in sizes 6 to 14, accommodating various finger sizes
- [How to Measure & Fit Check] Wear the sizing gauge snugly around the base of your finger, ensuring it doesnt rotate freely. We recommend wearing it for over 24 hours to determine your most accurate fit. For optimal data and comfort, the RingConn Smart Ring should fit snugly against your skin without rotating. When testing for the best size, make sure the sizing gauge remains tight around the base of your finger
- [Choose a Finger] The RingConn Smart Ring can be worn on any finger and on either hand. For optimal accuracy and comfort, we recommend wearing the RingConn Smart Ring on your index, middle, or ring finger. Be sure to size the exact finger on which you plan to wear your RingConn Smart Ring for the best fit
- [Manufacturing Quality] RingConn Sizing Kit is made from premium-grade plastic, while the RingConn Smart Ring is crafted from aerospace-grade titanium, coated with a scratch-resistant layer for outstanding corrosion resistance and durability
Operating System: Proprietary/Customized
Special Feature: Activity Tracker, Heart Rate Monitor
Connectivity Technology: Bluetooth
Wireless Communication Standard: Bluetooth
GPS: No GPS
Shape: Round
Brand: RingConn
Model Name: RingConn Gen 2 Sizing Kit
Color: Sizing Kit
Age Range (Description): Adult
Product Dimensions: 9.52 x 4.17 x 1.02 inches
Item Weight: 3.2 ounces
Item model number: SKR-02
Batteries: 1 Nonstandard Battery batteries required.
Date First Available: September 9, 2024
Manufacturer: Guangdong Jiu Zhi Technology Co., Ltd.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Feb 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
![Apple Watch SE (2nd Gen) [GPS 40mm] Smartwatch with Starlight Aluminum Case with Starlight Sport Band S/M. Fitness and Sleep Trackers, Crash Detection, Heart Rate Monitor, Retina Display](https://m.media-amazon.com/images/I/61umEhyV-UL._AC_US500_.jpg)
Top Amazon Reviews
Color: Matte Black
Size: 9
I’ve been using the RingConn Gen 2 for about six months now, and I absolutely love it. The features are fantastic, and the app is super intuitive and easy to use on a daily basis. The sleep tracking is especially impressive, and the wide range of body metrics it provides has been incredibly helpful for understanding how my body is doing overall. I also really appreciate how frequently the developers update the app and continue to add and improve features. I wear the ring every single day, including at work, and it still looks brand new with no scratches at all. The battery life lasts exactly as advertised, and charging is incredibly fast, making it effortless to keep it ready to go. Highly recommended!
...
show more
Reviewed in the United States on February 3, 2026 by Kevin
Color: Royal Gold
Size: 9
Just got my RingConn 2, and so far, I’m really impressed! I went with the gold, and it’s a gorgeous color that matches my other jewelry perfectly. The ring fits snugly and comfortably—I got a size 9 for my index finger. I also really like the portable charging case; it’s sturdy and convenient. I charge it while I shower, and it’s ready by the time I’m done. I’ve only let it get down to about 70%, so I can’t say how long it would take from a completely dead battery. The app is super user-friendly, and I love the sleep tracking feature—it seems accurate, and I look forward to checking my sleep score each morning. I haven’t compared steps or other metrics to my Apple Watch yet, but I plan to and will update my review later regarding accuracy. No scratches yet, but it’s new, so I’ll see how it holds up over time. From what I’ve seen from other users, I’m fully expecting some wear and tear eventually. What I really like: no subscription required, sleek design, and easy daily use. So far, it feels like a solid investment for anyone looking for a smart ring that’s both functional and stylish.
...
show more
Reviewed in the United States on January 7, 2026 by Kelsie Cabeceiras Kelsie Cabeceiras
Color: Royal Gold
Size: 10
If you want a fitness ring that monitors all the things, this is your ring. But here’s my favorite part, the fact that it monitors sleep apnea. So I was diagnosed with sleep apnea, and instead of getting a CPAP, I got a dental device, and to make sure the dental device was going its job I got this ring to help monitor and it’s done exactly that, every morning it gives me a report. I love that it does all other stuff as well and you don’t have to pay for a subscription for the app. Another feature that I love about the app is that it give you sleep scores and how to improve your sleep and all that. It also monitors your activity, stress and vitals. Then it also gives you an over all score and gives you suggestions on how to improve your overall score to lead a healthier life. So if you’re wanting a fitness ring that won’t break the bank, this is the one. Also, I love the color and fit. And the battery lasts for forever which is another biggie for me!
...
show more
Reviewed in the United States on January 12, 2026 by Candice Magnusson
Color: Future Silver
Size: 11
I ordered this fitness ring on July 10th, 2025, so I've had it for about 5 months now. What is making me finally write a review is that I accidentally just put this ring through the wash and you couldn't even tell. No damage at all from being in all that water and washed around with soap. I honestly really enjoy this ring. Pros: -Great battery life -Charging case also has great battery life -Free app that is user friendly and a bit customizable -Ability to track steps, sleep, exercise, sleep apnea, periods, heart rate, oxygen saturation, body temp, stress, and add notes. -With accuracy in tracking for steps, sleep, vital signs, exercise, and stress. -Useful information in the period section, about which part of the cycle you are in and what to expect. -Multiple types of exercise you can track from HIIT, sports, walking, etc. -Sleep is quite accurate I think, and gives you how long in each stage, heart rate variability, temperature, respiratory rate, naps, time in bed vs time asleep, and a subjective tracker for you to make how you feel. -You can track so many things with your period, I love the detail. See attached photos. -Sleek and easy to wear, not heavy at all. -Waterproof!! I wear this ring while washing my hands, washing dishes, accidentally left it in my pocket and put it through the laundry. No visible damage, and no issues with use. Cons: -Sizing is iffy. I ordered a size 11 for comfort but I think sleep apnea tracking would be better if I had a size 10 because it's closer to the skin although too tight for my comfort. -Touted for sleep apnea monitoring but doesn't seem to be accurate when compared to my home sleep test and cpap machine. Unfortunate, but hopefully they hone this tracking aspect in the future. -I haven't been good with remembering to track my periods in the app on top of my written planner, so I can't tell how accurate that is yet. -Poor gps tracking for walks and runs. I will start and end the walk timer for the duration of my walk which could be anywhere from 1 to 3 mi but will only chart that I did 0.05 miles. Luckily you are able to edit the mileage. Overall I love this ring and it's features, which are worth the midrange price tag.
...
show more
Reviewed in the United States on December 22, 2025 by MaeBC MaeBC
Color: Matte Black
Size: 10
Best smart ring with no subscription fee. 10 day battery life on charge. Nice features like auto workout tracking and sedentary movement warning. Can also track certain workouts with phone gps in app. Accurate step and sleep tracking. Also, has sleep apnea monitoring. A plus is small ring width making it comfortable to wear. Comes with handy charging case and charges quick. Highly recommended you try.
...
show more
Reviewed in the United States on January 2, 2026 by Paul O
Color: Matte Black
Size: 14
Nothing bad to say about this ring, super light weight, durable. The app is very easy to use. Seems to do very well at taking everything. The sizing kit was spot on and well worth the extra buck to verify size fit and comfort. Battery life is excellent. Only thing I would like with this ring is the ability to change the quick pick options for exercise on the main screen if the app, the 7 preset ones are the only ones and can't be changed based on personal preference. Overall ... EXCELLENT and will definitely upgrade to the gen 3 when available.
...
show more
Reviewed in the United States on February 2, 2026 by Neil Jenkins