The anterior and posterior diameter of the prostate, as the name suggests, refers to the length of the prostate from front to back, and the normal anterior and posterior diameter of the prostate in adult men is 2cm. The prostate gland resembles the shape of a chestnut. The size of the prostate gland in a normal adult male is generally 4cm x 3cm x 2cm, specifically, its transverse diameter is 4cm, vertical diameter is 3cm, anterior-posterior diameter is 2cm, and it weighs about 8~20g. When a man reaches the age of 50, his prostate gland will generally increase in size, which may cause discomfort. The prostate gland has a very significant role in the male urinary system and reproductive system, which is mainly involved in the control of urination, control of ejaculation, etc., but also involved in the formation of semen, such as feeling discomfort in the prostate area, it is recommended to go to the regular hospital in a timely manner to consult the doctor for treatment.