I decided I'd make a thread about completely off the wall did you know facts which I will update daily .
The Kinsey Institute found the smallest penis to be either 1.75 inches or 1 inch erect. However, in medical literature, there have been penises recorded to not even exceed 1 cm (roughly .39 inches). This would be a condition known as a "micropenis", an unusually small penis, that can sometimes be treated with hormonal therapy.
There is also a condition that would technically make make a penis even smaller than 1 cm. With congenital hypoplasia, the body of the penis is entirely absent. Instead, the head or glans of the penis is attached to the pubic region.