There are two free website tools that will help you find matches to the type of school you are looking for. US news has a search however you need to pay for it.
This one is configurable: http://www.collegeview.com/search/100b95
This one is hard coded: http://universitybenchmarks.com/schools/pomona_college.html
Swarthmore
Amherst
Washington Lee
Hamilton
Kenyon
Davidson
Bowdoin
Grinnell
Whitman
Williams
William and Mary
Good luck