webster's dictionary of mountain size according to the common man
tiny - 500ft vert or less
little - 500-1000ft vert - MC, camelback, blue, jfbb
regular - 1000-1500 ft - hunter, windham,
large - 1500 - 2000ft - stratton, okemo, mt. snow
huge - 2000+ - stowe, jay peak, whiteface, most western resorts
gargantuan - 4000ft+ - whistler
feel free to correct me, i didnt actually take the time to check verticals. just doing it from memory.
oh and vert = vertical drop = difference in altitude between base and summit.