Personally, I use them with 28mm....
But I am not a "Scale Nut" either....
That being said, I am pretty sure they are more towards 30mm to the eye (except for the midgets or the obviously larger guys...).
I think those are great looking figs,
very stylized (kinda cartoon-y in some instances, but you really do not have to paint them that way...) but still some great looking figs with a lot of character.
I know that Scale Creep has some on discount right now... (
www.scalecreep.com/catalog/index.php?cPath=1163_1257 ) And he has some wonderful service too...
BTW... Ron and Bones is a neat board game too!