The size of the prostate gland does not have a specific rule in each age group, mainly related to individual differences and diseases and other factors. 1. Individual differences. As a normal tissue structure, the size of the prostate gland increases gradually with age. In adults, for example, the transverse diameter of the prostate is about 40mm, the longitudinal diameter is about 30mm, and the anterior-posterior diameter is about 20mm. 2. Influence of disease factors. Due to prolonged congestion or some chronic inflammatory factor stimulation, resulting in prostate hyperplasia, hypertrophy phenomenon, this situation will gradually increase the volume of the prostate, more than normal, thus causing a series of symptoms, such as frequent urination, urinary urgency, urinary incontinence and so on. When the size of the prostate exceeds the normal, and accompanied by other symptoms, it is necessary to go to the urology department of the regular hospital in a timely manner, to clarify the cause of the disease under the guidance of the doctor’s treatment.