According to new scientific research, “the average flaccid, pendulous penis is 9.16 cm (3.61 inches) in length; the average erect penis is 13.12 cm (5.16 inches) long.”Apparently, a new study by the South London and Maudsley NHS Foundation Trust may be the most accurate to date as it didn’t count on self-reporting.“People tend to overestimate themselves,” lead researcher David Veale told the journalScience.

This new study was an analysis of data from previous papers that listed direct measurements of more than 15,000 men. The study also concludes that there’s no link between penis length and height or shoe size.

“Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15 521 men” (British Journal of Urology International)

Image: The, er, “Yard Dick.”