i personally believe under 4.5 is probably pencil dick territory BUT i often ask, where exactly are these 4.5 girth dicks ... i mean i am around 5 and i BARELY ever see anyone with my girth (only higher) so it makes me wonder if 5 is pencil dick territory as well
Possibly because it was proportional to their length you just didnt notice, i mean 4.5 inches of girth on a 7 inch length cock is going to look abit on the thin side, but on a 5 or 6 inch it would look "normal" .