Patient's question:
I'm not that old, although I don't have a girlfriend, but, whenever I see a woman, I can't help but look at her a few extra times. I feel a bit insecure because my penis is a bit small, but I also don't know what is considered normal. Could you please tell me what a normal penis size is?Doctor's answer:
The penis, like height, weight, and facial features, varies greatly among individuals, with differences in length and circumference. Shi Chengli in China measured the penis size of 1,412 healthy young Chinese men and the erect length of 126 healthy men. The results showed that the longest normal length was 19.5 cm, the shortest 3 cm, with an average of 8.375 cm. The maximum circumference was 14 cm, the minimum 2.5 cm, with an average of 7.3 cm. During erection, the longest length was 23 cm, the shortest 8 cm, with an average of 12 cm. The maximum erect circumference was 14 cm, the minimum 8 cm, with an average of 10.75 cm. Liu Guozhen et al. measured the penis length of 1,000 normal adult males, with lengths ranging from 4.9 to 8.6 cm under normal conditions, an average of 6.55 cm, the longest 11.6 cm, and the shortest 3.7 cm. Wu Weicheng et al. measured the penis of 2,547 male college students aged 16-25, with an average length of 7.43 cm and an average circumference of 8.17 cm. The average penile stretch was 13.34 cm, which was similar to the calculated erect length of 13.08 cm, suggesting that penile stretch can represent the length after erection. It is evident that the measurement results of different authors also vary, and the results are influenced by factors such as region and ethnicity. Additionally, the length of the penis in a normal state is not constant for the same individual; it can shorten under conditions such as stress, cold, or severe fatigue.