My penis is only 12.5 cm when erect. Is this short? Do I need to see a doctor? Please give me your advice.

Hello, your penis is normal in length and will not affect sexual intercourse. A man's penis is different from his height, fat and thin, and his facial features are different, with different lengths and uneven thickness. The penis size and length of healthy young men in China: under normal conditions, the longest is 14.5cm, the shortest is 4cm, the average is 8.375cm, the maximum circumference is 12 cm, the smallest is 4.5 cm, and the average is 8.3 cm. When standing upright, the longest is 16 cm and the shortest is 9 cm. (The above data is a sample survey of healthy men in China 1000 for reference only. )