Trump does have unusually small hands ranking him in the lower 15th percentile for his hand size. Marco Rubio mentioned this and he tried to tie it in with other body parts being small in stature. Scientific studies have found that there is no correlation between hand or foot size and the size of any other body parts. There is not any strong irrefutable repeated scientific evidence that visible body parts relate in any way to penis size. Many men worry about the size of their penis, but there actually is an medical condition that is based on erect measurements which is known as a Micropenis. In adults, the micro condition refers to any penis that is smaller than 2.8 inches in length.