<p>As some other people have said, newer dorms tend to have larger rooms, on average, as their room sizes are uniform. Older dorms tend to have smallewr rooms, at least for freshmen, but with seniority comes better choice(i.e. quads, etc.). The only exception I can think of is Carroll, which is a bit out of the way but is 103 years old, is the smallest dorm, and has the largest rooms on campus (It used to be a seminary).</p>