There is no specific data on the standard weight for a six-foot-eight person; in general, a weight of less than 80 kilograms is usually recommended for a six-foot-eight person. The standard weight for a meter eight can be determined by body mass index, waist circumference, and body fat measurement. Body mass index is usually expressed in terms of BMI, which is calculated by the formula BMI = weight (kilograms)/height (meters)². For a person who is five-foot-eight and weighs 80 kilograms, his BMI = 80/1.8² = 24.7 kg/m2. The human body’s normal weight BMI value between 18.5 ~ 23.9kg / ㎡, more than 24kg / ㎡ for overweight, more than 28kg / ㎡ for obesity, more than 32kg / ㎡ belongs to moderate obesity, more than 37kg / ㎡ belongs to the severe obesity. Therefore, the weight of one meter eight should not exceed 80kg. In addition, standard weight can also be determined by waist circumference. Male waist circumference less than 85cm, female waist circumference less than 80cm, is a standard weight, one meter eight waist circumference more than the above range, is obese. In addition to paying attention to weight and waist circumference, you also need to pay attention to the body fat rate. The normal range of body fat rate in adults is 20% to 25% for women and 15% to 18% for men, if the body fat rate is too high, the normal body mass index also belongs to obesity, and fat reduction is needed. It is recommended that the patient according to their own actual situation to make comprehensive consideration, to maintain a normal body weight, to reduce the occurrence of the disease.