What is the largest penis you have heard of or seen and what is the smallest?
"The largest penis in the world was recorded by a Doctor Robert Dickinson. In the early 20th century he measured the largest medically recorded penis in the world at 13.5 inches long and was 6.25 inches in girth."
[The Largest Medically Recorded Penis In The World]
"It seems that the largest recorded length was 14 inches in Dr. David Reuben’s “Everything You Always Wanted to Know About Sex”. “Of all penis sizes quoted in the literature the largest is unquestionably the 14 in. erect organ mentioned by Dr. David Reuben in "Everything You Always Wanted to Know About Sex".”"
There are men who because of a genetic disease have what is called micropenis. A micropenis is one in an adult male that is less than two inches long when erect. There are men with penis that are only one to one and half inches long when erect. See: Micropenis