Ensure the perfect fit for your Ultrahuman Ring AIR with this official Sizing Kit. Before you invest in the smart ring, use this kit to accurately determine your size from options 5-14. The Ultrahuman Ring sizes differ from standard ring sizes, so a sizing kit is essential. This kit includes a ring sizer, charging dock, and USB-C cable. Once you have your correct size, you can purchase the Ring AIR with confidence, avoiding returns. The actual ring offers comprehensive health tracking: sleep, activity, stress, heart rate, recovery, and women's health insights (ovulation, cycle, pregnancy) with no subscription fee. Track all your health metrics in one app.
