Product Parameters: Body measuring tape ruler size: approx. 150*0.15cm /59.1 *0.1in; case diameter: approx.7cm /2.75in; small and easy to carry, you can use it anytime, anywhere. BMI Calculation Tool: This body measuring tape comes with a BMI calculator that can read your BMI directly without complicated calculations. Gain a better understanding of your health. Easy to Measure: The retractable body fat measuring tool makes it easier to measure your neck, chest, abdomen, waist, hands, and legs with a clear scale that is easy to read. Professional Manufacturing: The body measuring tape case is made of ABS material, and the measuring tape is made of PVC and fiberglass material, which is harmless to the body and easy to use. Scope of Application: This body measuring tape has a separate identification number on the ruler, effectively combining the different measurement formulas for male and female BMI to help more people achieve their ideal results.