I'm about 4 x 4 when hard too, you can see it here:
My soft cock - what do you think? - JustUsBoys.com Gay Community
I think it is just fine here..After all size is all in the head..if you are smaller then you'd like to be it may affect how the little guy works...So, what's this actually got to do with the health of your penis? Moderators please feel free to vapourise this thread.
6.5" (erecty)
0.75" (soft) in this unusually inclement weather; UK)
The smaller guys are not that bad, some have decent girth