Size matters… at least for science. Using data from 17 previous papers covering a total of 15,521 men worldwide, researchers in the UK performed a meta-analysis of what they believed to be the average erect and flaccid penis size and girth. Average penis size compared to a bananaCredit: Luke Leonard, MashableUPDATE: Jun 5, 2023 1:17pm AEST This article was originally published in 2015 and has since been updated in June 2023