I found different information for Kinsey data regarding penis size . Some resources declare that this survey involved 3,500 college males but I found different information on the site of The Kinsey institute :
“Men were asked: “How long is your penis, measuring on the top side from your belly out to the tip?” They were each given a pre-stamped card to take home, and instructed to mark the length on the card when flaccid and when erect. Approximately 2,500 men participated”. Here they don’t specify the age of the participants ( college males or no ).
Do you know from where I can find some information about it?