What is the normal size of a male penis?

Patient's question:

Can the penis of an adult male be enlarged with medication?

Doctor's answer:

The penis length of adult males in our country is 4.5~8.6 cm in a normal non-erect state, with a circumference of 7~9.5 cm. During erection, it measures 7~16 cm (with an average normal range of 10.87~15.27 cm), and the circumference increases to 9~12.5 cm, all of which are within the normal range. Clinically, it has also been observed that penises that appear larger do not increase significantly in length during erection, whereas smaller-looking penises tend to show a greater increase in length when fully erect. It is evident that any penis within the normal range can meet the needs of normal sexual function during erection, and there is no need to worry about the so-called "penis being too short."

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