Average size of penis in the world. What Are Sexual Norms? 25.02.2018 Shaktigis Another In Nigeria, western Africa, the average length was 8. Invalid Date. Additionally, it revealed that men often overestimated average penis size compared to women. Whether penis size truly matters or not really depends on the person you ask. The top of your penis is where it connects to your pubic bone. Share or comment on this article: Log in. One published in took measurements of 3, young Italian men aged between 17 and 19 years. Health and Medicine.