Is there a "typical" size for a crime scene?

I would agree with the above poster in that no two crime
scenes are alike, but I would also say there is a "typical" size for a crime scene. 
Crimes tend to be committed in isolated settings, that is, out of the public eye.  This
often means they are committed indoors and behind closed doors, which relegates the size
of the crime scene to that of an average room - 12 X 12.  The point of the actual crime
itself - a shooting, an assault, a robbery - is quite small, a few square feet even.  It
is the scattering of evidence, blood spatter, DNA, shell casings, etc. that expand the
size of a crime scene in many circumstances, and that scattering also has "typical"
limits, whether it be from the walls of a room or the distance such evidence can
travel.