Tool: This size kit provides accurate measurements for most smart and health tracking rings, ensuring a suitable and comfortable fit Accurate Measurement for Optimal Performance: The Kit allows you to measure your finger properly. With sizes 4-15, this kit ensures you get the , enhancing the data accuracy and overall comfort Custom Fit for Your Finger: Designed for all fingers, the Kit ensures a secure and comfortable fit. For best results, wear it on your index, middle, or ring finger, and measure for 24 hours to confirm the most accurate fit for Ring Easy and Convenient Sizing Tool: Simply measure the circumference of your finger according to the instructions in the size kit, and you find the correct ring size. This tool can be reused multiple times and is perfect for personal or household use Avoid Sizing Errors: The Kit is designed to help you avoid discomfort from incorrect sizing. Avoid returns and exchanges by finding your correct size upfront with our professional sizing kit Product Introduction: Product name: Kit Purpose: , High-Quality Sizing Tool Size: 4/5/6/7/8/9/10/11/12/13/14/15 Color: White Design: Simple, Professional Finger Measuring Tool : Helps you accurately measure your finger for the best fit, ensuring maximum comfort and for Ring 4 Durability: Reusable and designed for long-lasting accuracy and performance Versatility: Ideal for use on any finger of either hand, perfect for anyone looking to find the right fit for their Ring Material: Package Contents: 1*pcs ring-sizing kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.