Use your normal ring size only to pick the first sample to try.
Ultrahuman Ring AIR sizing guide
Check current US availability. The 2025 USITC order makes Ultrahuman availability legally volatile for the tracked model. Verify the current US product lineup before buying.
Ultrahuman Ring AIR uses its own sizing kit, and Ultrahuman says Ring AIR sizes may differ slightly from standard US ring sizes. Use the kit rather than ordering from a jewelry-size conversion alone.
- Sizing system
- Proprietary (plastic sizers)
- Size range
- Sizes 5–14
- Sizing kit
- Free plastic sizing kit on order.
- Price
- ~$349
Smart-ring advisor
Check smart-ring fit
Order-size check
Follow the brand kit because sensors need steady skin contact.
Wear the sample long enough to catch swelling, sleep, and hand-temperature changes.
Does my normal ring size fit?
Ultrahuman Ring AIR uses its own sizing kit, and Ultrahuman says Ring AIR sizes may differ slightly from standard US ring sizes. Use the kit rather than ordering from a jewelry-size conversion alone.
Use the ring size converter to find your standard size first — it's a useful starting point — but always confirm the Ultrahuman Ring AIR fit with the brand's sizing kit or sizing flow.
Frequently asked questions
Can I buy the Ultrahuman Ring AIR in the US?
Treat US availability as high-volatility. The 2025 USITC exclusion order blocks unlicensed infringing smart-ring imports and sales tied to the Ring AIR dispute; check Ultrahuman’s current US product lineup before buying.
What sizes does the Ultrahuman Ring AIR come in?
Sizes 5 through 14, measured with the plastic sizing kit.
Compare all devices on the smart ring sizing guide.