Penis size and the different types of penile enlargement techniques are two complicated topics. According to the Mayo Clinic, the average penis is about 3 to 5 inches long when not erect and 5 to 7 inches long while erect. A penis can be considered "abnormally small" if it is less than three inches. There are many ways to make your penis larger, if you feel like you are on the small side or if you just want a little bit of a boost. Male enhancement pills, vacuum pumps, types of stretching and other types of exercises can aid in your penile enlargement goals. Not every method of enhancement is right for everybody, but by using the directory of websites you can compare products and methods to figure out what is right for your situation.