At Washington and Lee, all the sorority houses are the same size (they were built together and are school-owned). A picture of our house can be found at
http://piphi.wlu.edu.
The three largest chapter houses (by my guessitimate, and in no particular order) are:
FIJI (
http://fiji.wlu.edu) great website!
Phi Kappa Psi (
http://phipsi.wlu.edu)
Chi Psi's Lodge