Even though the photo of this erection makes it look like it points down a little, it is actually about horizontal. It is 4.25 inches long. This probably seems rather short to people who are used to looking at erections on the web or in pornography - but it's not!  There are many, many erections of this length and shorter.  We don't know how many because men with smaller penises typically do not volunteer to participate in sex research studies. This 27-year-old is a large man:  6 ft. 3 in., 250 lbs.