If you study a lot of so-called "big dicks" online, most are "heavily" photoshopped. I've been fooled a few times, however.
The vast majority of males are "your" size - that's right around "your" size.
There are very few super well-hung men out there with no need for PE.
Biggest "real" dicks I've ever seen:
Sean Diesel (overall penis volume)
Lex Steele (just length, not girth, though)
As far the white dudes:Billy Glide was one of the biggest in "whiteland" adult entertainment, especially his girth (he died a few years ago).
Also: Nacho and Manuel Ferrera are among the biggest white dudes in adult entertainment. Ferrera is even thicker than Glyde's. I'm not sure which one of the three has the biggest penile volume.
If anyone else would like to chime in, go ahead.