You can calculate that birth height (cm) divided by weight (kg) multiplied by 10 equals your body index. Ordinary people's body index is around 20, and 20-25 is normal, while models are generally around 17, which means height 175cm model weight 102-65. The height of female models in the modeling field is generally above 170, but there are exceptions (such as the famous twiggy is shorter). The way for female models to lose weight is nothing more than dieting, exercise and massage. Traditional slimming methods are often the most effective, so don't risk your body in the bizarre methods that are popular now.