Hello, there are many differences between a man's penis and his height, fatness and facial features. His penis is 5-6 cm long when he is soft, and twice as long when he is erect as when he is weak. If his penis length is less than 4 cm when he is weak and less than 8 cm when he is erect, it is called short penis. Short penis really needs surgery and can be treated surgically. But this operation is very complicated and has many complications. In real life, the so-called penis short is very rare. You can check it sometime. The measurement method should be regular. Just because it looks small means it is small. As long as it is within the normal range, it has normal function. If the penis is very short, consider extending the operation. At present, there is no medicine that can achieve the effect you require.