COLMI Sizing Kit

Choose your COLMI smart ring size with confidence before ordering. The COLMI Sizing Kit lets you try different ring sizes at home, compare the fit on your preferred finger, and select the size that feels comfortable for both daytime wear and overnight tracking.

Why the right fit matters

A smart ring should sit securely without feeling too tight. The right size helps the ring’s sensors maintain closer, more consistent contact with your skin, supporting more stable wellness readings throughout the day and night. A ring that is too loose may rotate or shift, while a ring that is too tight can become uncomfortable during extended wear.

How to find your size

1. Try the sizing rings on the finger where you plan to wear your COLMI smart ring.
2. Choose a size that feels snug and secure but does not pinch or restrict your finger.
3. Wear the sizing ring for several hours, including during sleep if possible, to check comfort as your finger naturally changes throughout the day.
4. Confirm that the ring does not rotate freely and can still be removed with gentle resistance.

For comfort and more consistent readings

• Find a comfortable size before purchasing your smart ring.
• Reduce unnecessary movement between the sensors and your skin.
• Check the fit under real daily and overnight conditions.

Finger size can vary with temperature, activity, and time of day, so test your preferred size more than once before making your final choice.

Read the COLMI Sizing Guide for more fitting tips, then explore COLMI smart rings.

Please note: The sizing rings are for fit testing only and do not contain electronic tracking features.