Two urologists measured 104 men to settle it, and it is settled.
Two urologists at University College London measured the stretched penile length and shoe size of 104 men and looked for a relationship. There was none. They published the result in a urology journal specifically so that the question could be answered with a citation.
Height and weight fare no better in the wider literature. The one measure that has repeatedly shown a weak statistical association is the ratio between the index and ring fingers, a marker of prenatal testosterone — and the association is far too weak to predict anything about any individual.