I am 5' 9" and, according to my second wife, had smallish-normal male equipment (she had lots of experience to compare it to), but I think she may have meant girth rather than length.
I started out with about 6½" and am now down to about 6". (I can usually barely see the top dot on the Soul Source dilator when I use a mirror and flashlight, looking along the top of the dilator into my vagina.) Bowers claims that you can never get more and can get less depth through neglect. I think that I lost the ½" on the trip home when I didn't dilate mid-day.
One of my surgery partners was a tiny woman (size 0 dress). She said she started with only 4".
According to several of my GG friends, penis girth is far more important than length. If all that stuff down there ever stops being sore, and I can find a cute, clean man who is attracted to older, slightly masculine women, I'll let you know.

- Kate