<p>Boston College - 9,000 students, big time sports. </p>
<p>As others have mentioned, the Patriot League schools (from Lafayette at 2400 up to around 5,000).</p>
<p>Elon University, in NC - 5,000 students. While not technically a liberal arts college, it is in the liberal arts tradition. </p>
<p>All of the above are fairly preppy . Kinda hard to think of a mid-size college with football that is NOT preppy.</p>