1、The environmental protection PVC plastic ruler can pass the European and American ROHS and 6P (phthalate‑free) environmental protection tests. 2、Does not contain any harmful chemical ingredients, non-toxic and tasteless. 3、It can be used to measure the chest circumference, waist circumference, leg circumference, as well as the baby's head circumference and height. 4、The tape can be automatically retracted, which is convenient for use and storage. 5、This product is resistant to high temperature, corrosion, acid and alkali. Condition:100% Brand New Item Type: Fat CaliperScope of Application: Measuring head circumference, waist circumference, hip circumference, leg circumference, arm circumference. BMI (Body Mass Index) is the body health index, which is closely related to the total body fat and mainly reflects the body's overweight and obesity. The world standard for obesity is: BMI is within the normal range from 18.5 to 24.9, BMI greater than 25 is overweight, and BMI greater than 30 is obesity. The BMI health ruler is able to quickly calculate your body health index, saving the complicated mathematical calculation process, just correspond your height and weight values according to the compass library instructions, and the arrowhead points to your health index value. The operation is simple and convenient, suitable for all ages!Instructions: 1. The small turntable in the middle of the rotating tape measure matches the weight according to the individual's height; 2. When the height matches the weight, the BMI will aim at a value, which is the mouth of the face BMI aims at HEALTHY means health; Aiming at OVERWEIGHT means overweight; Aligning to OBESE means fat; Aim at VERY OBESE to indicate excessive obesity; Aim at UNDER WEIGHT means thin. 3. The ruler inside is used to measure waist circumferenceBMI Tape Measure: Material: Plastic, PVC, Metal Tape Measure Size: Approx. 150cm x14mm/59.1 x 0.55in Shell Size: Diameter: Approx. 7cm/2.76in Thickness: Approx. 2cm/0.8in Color: White shell, four-color tape, black scale Tape Measure Scale: cm on both sides, one side for women, the other side for menFat Clip: Material: Plastic Size: Approx. 16.5 x 9.8 x 0.6cm/6.5 x 3.9 x 0.2in Color: Black Caliper Tape Measure Scale: One side mm + inch, scale 60mm, 2.5 inches Waist Tape Measure : Material: Plastic , PVC Tape Measure Size: Approx.150cm x 13.5mm/59 x 0.5in Shell Size: Approx. 9 x 6 x 2cm/0.4 x 0.2 x 0.1in Color: White shell, white tape, black scale Tape Measure Scale: cm on one side and inch on the other side 1 x Fat Clip 1 x BMI Tape Measure 1 x Waist Tape Measure 1 x Fat Clip Instructions