Not completely sure, but iirc, at THE MINIATURES PAGE somebody commented tese model ARE NOT 28mm.
They are smaller (like 25mm) so maybe it's worth checking them "in person" before you commit to buy tthem.
Actually, they have their rulebook for download and they clearly say:
The figures in this game
are 25mm scale, and each
figure comes attached to a
small stand, or “footpad,”
that displays the figure’s
collector number and has a
number of pegs protruding
from its base.
Hope that helps.