Ultrahuman Ring AIR Sizing Kit

Precision starts with the perfect fit.

The Ultrahuman Ring AIR Sizing Kit makes getting started simple. For just $15, you’ll receive ten sample ring sizes to help you find the perfect fit — and that $15 becomes a store credit automatically applied when you purchase your ring using the same email address.

Why this matters:

Ultrahuman Ring AIR sizes are unique and differ from standard ring sizing and other smart rings. Finding the right fit upfront ensures long-term comfort and more accurate health insights — no guesswork, no sizing issues, no delays.

What’s included:

• 10 sample ring sizes (5 - 14)
• Easy-to-follow sizing instructions
• $15 credit automatically applied to your Ultrahuman Ring AIR purchase

How to find your size:

• Try multiple sizes on both hands.
  • Test on your index, middle, and ring fingers. Once you find a snug fit, try a size up and down to be sure.
  • Wear it overnight (or two).
  • Finger size changes throughout the day. An overnight fit test helps confirm long-term comfort.
• Confirm the fit - You’ve got the right size when,
  • It feels snug but comfortable.
  • The sensor ridge sits on the palm side.
  • Your skin moves with the ring when rotated.

No need to submit your size.

Once you’re confident, simply purchase your Ultrahuman Ring AIR using the same email address you used to order the sizing kit and your $15 credit will be automatically applied at checkout.

Need help?

We’ve got you. Reach out any time at support@fastwic.com.