Onyx Smart Ring
Onyx Smart Ring
Free Shipping
Couldn't load pickup availability
Onyx Smart Ring
Try Risk-Free — 14-Day Guarantee
What is this?
What is this?
Onyx is a next-generation smart ring that monitors your health 24/7 — no screen, no daily charging, no compromises on style.
Worn on your finger like regular jewelry, Onyx tracks:
- 💓 Heart rate
- 😴 Sleep quality and stages
- 🔥 Calorie burn and physical activity
- 🩸 Blood oxygen level (SpO2)
- 🧘 Stress and recovery levels
- ➕ And much more
All data goes straight to your phone app — clearly presented, without unnecessary noise.
Who is this the perfect solution for?
Who is this the perfect solution for?
Onyx is for you if:
- You want to track your health
- You care about sleep quality and recovery — not just step counts
- You lead an active lifestyle and want data that actually helps
- You value a discreet, elegant look — at work, at the gym, and at dinner
Perfect for: athletes, entrepreneurs, wellness-focused individuals, and anyone who simply wants to live more mindfully.
Size
Size
Sizes are listed in US ring sizes (table below). Not sure of your size? Here's how to measure:
Method 1 — String or strip of paper:
- Wrap a string or narrow strip of paper around the finger you'd like to wear the ring on
- Mark the point where it overlaps
- Lay it flat against a ruler and measure the length in millimeters — that's your inner circumference
- Find your size in the table below
Method 2 — Existing ring:
- Place a ring you already own against a ruler
- Measure its inner diameter in millimeters
- Find your size in the table below
💡 Tip: Measure in the evening — fingers tend to be slightly larger than in the morning. If you're between sizes, go with the larger one.
Size Chart:
US Size #6 | Diameter: 16.5 mm | Circumference: 52 mm
US Size #7 | Diameter: 17.4 mm | Circumference: 55 mm
US Size #8 | Diameter: 18.2 mm | Circumference: 57 mm
US Size #9 | Diameter: 19.0 mm | Circumference: 60 mm
US Size #10 | Diameter: 19.9 mm | Circumference: 63 mm
US Size #11 | Diameter: 20.7 mm | Circumference: 65 mm
US Size #12 | Diameter: 21.5 mm | Circumference: 67 mm
US Size #13 | Diameter: 22.3 mm | Circumference: 70 mm
Shipping
Shipping
All orders are typically shipped within 1–3 business days, and a tracking number will be sent to you via email.
Frequently Asked Questions
Frequently Asked Questions
Is Onyx waterproof? Yes — Onyx is IP68 water resistant, so you can wear it in the shower and while swimming.
How long does the battery last? The Onyx battery lasts between 3 to 5 days on a single charge.
What sizes is the ring available in? Onyx is available in US sizes 6–13.
What phones does Onyx work with? The Onyx app works with both iOS and Android.
Do I need a subscription? No — all features are available for free in the app. No hidden fees.
Your Health at Your Fingertip
Onyx monitors your heart rate, sleep, and physical activity around the clock, delivering precise data straight to your app. No screen, no distractions — just what truly matters.
Sleep That Actually Restores
Onyx analyzes every stage of your sleep and tells you what to do to sleep deeper the next night. You wake up rested because you know exactly what's happening to your body overnight.