I feel that most women lie when they say “size doesn’t matter,” because it does. Sorry guys. Size matters so much, a map has been created for you to navigate to find your ideal fit. The average penis erect measures between 5 to 6 inches. Certain random countries may surprise you with their shortcomings, while others may entice you to head to another country for a little penis-perusing. The sad thing is though that in North America, Americans are sizing up to be the smallest. Bummer.