Wearing a biometric ring is one of the most powerful ways to understand your body—tracking sleep quality, recovery, readiness, and heart rate metrics over time. Because AlterMe’s ring is a precision biometric device (not a traditional jewelry ring), getting the right size is essential for accurate tracking and long-term comfort.
Proper sizing starts with selecting your ring preferences and utilizing the provided sizing kit during the initial ordering process.
How do I exchange or resize my AlterMe ring?
If you need to exchange your AlterMe ring for a different size or style, please contact our Member Success team to get started. We currently offer two ring styles: the AlterMe Ring and the AlterMe Ultra Ring. Each ring style has its own sizing kit, so you’ll need to select your preferred ring style before we can send a sizing kit. A Member Success agent can help you choose between the AlterMe Ring and AlterMe Ultra Ring.
If you're ordering an AlterMe ring for the first time, you’ll begin by selecting your ring preferences—this includes options for style and color. After confirming your preferences and submitting your order, a sizing kit will be sent to you to ensure the right fit.
A ring sizing kit is provided both for first-time orders and in cases of exchanges or resizing. Once you receive the correct kit for your selected ring style, we recommend wearing the ring sizer for at least 24 hours to ensure the most accurate fit, since finger size can fluctuate throughout the day.
Replacement ring pricing varies. Contact Member Success for pricing and to place your order. Member Success is available Monday–Friday from 7:00 a.m. to 5:00 p.m. MST. Click the AlterMe icon in the bottom right-hand corner of your screen to start a chat, or call (866) 258-3763 to speak directly with a member of our Support Team.
Ring sizing tips (recommended)
To help ensure the best fit and avoid the need for an exchange, please follow the sizing steps below.
Which finger should I wear the ring on?
For the most consistent tracking, we recommend your index finger on your non-dominant hand. You can also wear it on your middle or ring finger—the best choice is the finger that feels the most secure and comfortable.
Use the ring sizer (wear for 24 hours)
Once your sizing kit arrives, choose a size that feels close to right and wear the sizer for at least 24 hours (including sleep, daily activity, and washing hands/showering). Finger size naturally changes throughout the day, so this helps you choose a size that fits in real life—not just in the moment.
Once you have decided on the size, follow the instructions provided to communicate your confirmed size back to AlterMe—either through an online portal or by contacting Member Success.
How should it fit?
Your ring should feel snug but not tight. You should feel slight resistance over your knuckle, and the ring should not rotate freely or feel uncomfortable. If you’re between sizes, size up.
Why sizing matters
Accurate tracking depends on consistent sensor contact. A loose ring can cause disrupted readings, while a tight ring can be uncomfortable and lead to wearing it less often. Consistent wear and fit provide the best data and insights.