The male penis in a weak condition 2-3cm is normal, after erection greater than 7cm this is normal. For many men, he has a misconception that the longer the erection, the better, but this is actually not the case. Men can complete normal sexual intercourse and complete the process of procreation as long as the length after erection is greater than 7cm. Male patients are advised not to judge by the length in a weak condition because the male penis is a very strong organ that will erect quickly when sexually stimulated. Generally the shorter it is when weak, the more the length of the erection will increase after erection. It is recommended that if the erection is greater than 7cm, there is no need for any medication or surgical treatment.