Find Your Size

Find Your Perfect,Voltery Fit.

The right fit makes a difference. A secure, comfortable Voltery Smart Ring maintains consistent contact with your skin, helping its sensors capture reliable wellness, sleep, and activity readings throughout the day and night. For the most reliable sizing experience, we recommend using the Voltery Sizing Kit as the primary sizing method. The size chart below can be used as a helpful reference.

Start With a Free Sizing Kit

Not sure about your size? We'll help you find it.

Order a free Voltery Sizing Kit and try our available ring sizes before confirming your final Voltery Smart Ring size.

How Sizing Works

Get Your Sizing Kit

Request your Voltery Sizing Kit and we'll send you sample sizes to try.

Find Your Fit

Try different sizes on the finger where you plan to wear your Voltery ring. Your ring should feel secure without being uncomfortably tight.

Wear It for 24 Hours

Finger size can change throughout the day. Wear your preferred sizing ring during normal activities and overnight to make sure it remains comfortable.

Confirm Your Size

Once you've found the right fit, submit your selected size using the confirmation instructions provided with your kit.

Get Your Voltery Ring

We'll prepare your Voltery Smart Ring in your confirmed size and proceed with fulfillment.

Voltery Ring Size Chart

Use this chart as a reference if you already know your measurements.

US Ring Size	Inner Diameter
7	17.3mm
8	18.1mm
9	18.9 mm
10	19.8 mm
11	20.6 mm
12	21.4 mm

Measurements are approximate. The Voltery Sizing Kit should be used to confirm your final size because smart-ring dimensions and fit may differ from conventional jewelry rings.

What Does the Perfect Fit Feel Like?

Your Voltery ring should sit snugly and comfortably against your skin. It shouldn't rotate freely during normal movement, but it also shouldn't pinch your finger or be difficult to remove.

For consistent sensor contact:

Choose a finger where the ring stays securely positioned.
Avoid a fit that leaves a noticeable gap between the ring and your skin.
Check the fit during both the day and night.
If you're between two sizes, test both using the sizing kit before making your final selection.

Already Know Your Size?

If you're confident about your Voltery size, you can skip the sizing kit and select your available US ring size directly on the product page. Know your size? Choose your ring and get started. Still unsure? Get your free Voltery Sizing Kit →