COLMI Smart Ring Sizing Kit Finger Measure Tool Size 6-12 Fitness Tracker Sizer

100% Genuine COLMI Smart Ring Sizing Kit for R02 and R10 (Sizing Tool Only – No Electronics)  * Get the perfect fit with an official, original manufacturer tool! This is a 100% genuine COLMI factory sizing kit. We strongly recommend using this authentic COLMI kit before ordering your COLMI R02 Smart Ring. Because smart ring sizes can differ from standard jewelry sizes, using the genuine brand kit guarantees a comfortable fit, ensures accurate tracking data, and prevents unnecessary returns.  Official Sizing Guide & Tips for Best Results  * Choose the Right Finger: For maximum tracking accuracy, we recommend wearing the ring on your index finger. The middle or ring fingers also work well. Avoid fingers where the base is significantly narrower than the knuckle.  * Proper Sensor Placement: When testing a size, ensure the sensor bump inside the ring rests on the palm side of your finger. The ring should fit securely and comfortably at the very base of your finger.  * Test the Fit (The Fist Test): Put on a plastic sizing ring and make a tight fist. If you see a visible gap between the top of your finger and the inside of the ring, try a smaller size. A ring that is too loose will result in inaccurate health data.  * Wear it for 24 Hours: Your fingers naturally swell and shrink throughout the day based on temperature and activity. Wear your chosen sizing ring for a full 24 hours to confirm it stays comfortable from morning to night.  Important Sizing Notice  * Sizing rings can shif