text: longes penis known? longest penis known in history the largest erect member in medical literature would be the 14-inch organ mentioned by dr. david reuben in his book everything you always wanted to know about sex (1969). reuben didn’t divulge any source for this figure, and there was no independent verification, so you may question his accuracy. the largest medically verified penis on record is 13.5 inches long and 6.25 inches around, documented in the early twentieth century by dr. robert l. dickinson. other sources (alfred kinsey, masters and johnson, etc.) mention specimens ranging from 9.5 to 12 inches.  then there are the dubious claims of immense penis size by various personages operating within the sex industry (read: porn actors). these claims are almost invariably false, the result of exaggeration and hype by unscrupulous dealers hoping to hawk more products. take the legendary long dong silver, for instance. made famous by the clarence thomas-anita hill hearings, his one enduring trait was his supposedly 18-inch penis. totally fraudulent, as it turns out; in fact, there are videos in which he appears only normal sized.