Re: fault throw versus length.
Although I know your looking for quick figures I think this topic needs some indepth explanations..
A large number of studies show that fault through vs length have a linear relationship. This is called the D/L ratio and gives insight in the shear deformation of the micro and macro-scale strucutres that accommodate deformation as a result of stress. Some scientist still debate this simple relationship though.
Anyway... to answer your question I have attached a logarithmic plot of a fault length vs fault displacement of a fault in the North Ses (Pickering et al. 1996) The relationship plots largely along a straight line.
A different study by Schultz and Fossen in 2002 also plotted the same fault parameters Throw vs Length of a variety of sources. The conclusion was that the maximum displacement depends on both the fault length and height as well as the driving stress and several rock properties. There is no such thing as a relationship that is consistent for all lithologies and stress regimes, but comparing faults in a region can give insight in fault Length and throw relationships.
I attached the plot by Schultz et al. 2002 aswell...
The D/L ratio I am talking about here is usually calculated from the displacement profiles (which show the fault length vs height) together with other factors such as rock type and applied stress. Once again, there is no uniform relationship you can apply everywhere over the world.
Hope this helped!