20cm semi
/r/sizecomparison: a little bit of erotic penis envy - This sub is for those who get off on comparing size. Please only post pictures/videos/stories depicting noticeable differences in size, or (for solo shots) a reasonable object for comparison. - August 4, 2019 - 18:51
/r/cockcompare: Stories, Pics, and Videos of people comparing cocks, either in real life or drawn/animated - As a girl I've never been able to compare my own cock to someone else's but I know my BF used to do - August 4, 2019 - 18:51
/r/penismeasured: Measure Your Penis! - June 11, 2019 - 11:16