M (recommended to wear 50-55kg )L (recommended to wear 55-60kg )Xl (recommended to wear 60-65kg )Xxl (recommended for 65-72.5kg years old)3xl (recommended to wear 72.5-80kg )4xl (recommended to wear 80-90kg )5xl (recommended to wear 90-105kg6xl (recommended to wear 105-120kg )