I believe they're actually 28mm - I have several Warlord hard plastics (Celts, Romans, WWII British & Germans) and they're all closer to "true 28mm," rather than the "heroic 28mm" of Warhammer minis. So unless they intend to change it up with these guys, which seems unlikely since the release corresponds to their new ancients ruleset which is supposed to be 28mm scale (I think), then these guys are probably 28mm too.