If you feel unsure about sizing or fall between two sizes, that’s completely normal when choosing a smart ring. The right Luna Ring size should feel secure, comfortable, and easy to wear both day and night.

Try different fingers
The Luna Ring can be worn on several fingers. Many people prefer the index, middle, or ring finger, but the best fit can vary between hands. If one finger feels slightly tight or loose, try the same finger on the opposite hand or a different finger entirely.

What the right fit should feel like
Your Luna sizing ring should feel secure, balanced, and effortless:

• It should sit flush against the skin without visible gaps when your finger is straight
• It should rotate with gentle resistance
• It should remove smoothly without discomfort

It should feel snug but not restrictive, sitting comfortably at the base of your finger.

Check the knuckle fit
When putting the ring on or taking it off, it should pass over your knuckle with slight resistance, but it shouldn’t feel difficult or require force. Once in place, it should rest naturally at the base of your finger.

Wear it for a full day
Wear your selected size for a full 24 hours, including overnight. Finger size naturally fluctuates due to temperature, hydration, and activity levels, so this helps confirm the ring stays comfortable throughout the day and night.

If you’re between sizes
If one size feels a little snug and the next slightly loose, we generally recommend choosing the larger size to maintain comfort as your finger size changes during the day.

The goal is a size you can comfortably wear 24/7, allowing your Luna Ring to track your health and wellness consistently.

More questions? Feel free to contact us!