“Omar, I didn’t buy any condoms because the drugstore only had the magnum size,” said Lisa, Omar’s fiancé. The average size of an erect penis is 5-7 inches. Most condoms are designed to fit the average man. Even though Lisa may have made Omar feel unmanly, Lisa did the right thing by not buying condoms that would have been too big for Omar. If condoms are too big, then they will likely slip off. Conversely, men who are at least 8 inches may consider buying a larger sized condom. Condoms have a higher rate of breaking if they are too tight. We all know the dangers of having a condom slip off or break during sex. The results can range from unplanned pregnancies to HIV. Whether Jimmy’s size is average or large, make sure he is fitted properly.