http://www.mahoodsculpture.com/greek-sculptures-wiki/

Why Ancient greek sculptures bore genitals that are way too small?
Or was it a Greek custome in those days?
http://en.wikipedia.org/wiki/File:Apollo_ny_carlsberg_glyptotek.jpg
http://en.wikipedia.org/wiki/Kouros
http://en.wikipedia.org/wiki/File:0064MC.jpg
http://en.wikipedia.org/wiki/File:Dioniso_del_tipo_Madrid-Varese_(M._Prado)_01.jpg
I guess I’ll have to take exception and say that they don’t look all that small. One might. None of them are erect so you won’t see size like that.
The models were all non-circumcised. Sometimes the penis will be hidden by the foreskin.
The testicles, for the most part, appear to be size-proportionate to the statues to which they’re attached.
Parthenon Sculptures, British Museum (part 1)