There is no authoritative information on how large a prostate is normal for a 70 year old male. Usually a prostate of 2 x 3 x 4 centimeters is normal, but there is individual variability in the exact size. The prostate gland is a male-specific gonadal organ, which is composed of prostate tissue and muscle tissue. Currently, there is no authoritative information that specifies how large the prostate gland is at the age of 70 is normal. From an anatomical point of view, the volume of the prostate grows with age, and the growth rate is faster in old age. It is usually believed that the transverse diameter of the prostate at 70 years of age is about 4cm, the vertical diameter is about 3cm, and the anterior and posterior diameters are about 2cm, which is normal. However, the specific size of the male 70-year-old prostate there is obvious individual variability, can not be generalized, if the above data on the basis of a slight fluctuation of 1 to 2cm, and without any discomfort, it is also a normal situation, do not have to worry about excessive. If the size of the prostate is too large, it will cause prostate hyperplasia, which can cause frequent urination, increased nocturia and other symptoms. For 70-year-old men, regular medical checkups are needed, and if there is any discomfort, you need to go to the hospital in time to avoid delaying your condition.