There is a fair bit of size difference going on there, and only a couple of years between them. The wee fella with the bottle is pre-slotta (an old FS series brought forward into the C series) so probably in 'true' 25mm scale, with the others likely being the oversized 25mm or 28mm. It works nicely with these guys, being a rag-tag bunch anyway. The club-armed models used for the Maltmen are almost all taken from the C-series 'civilians', including the Citadel militia, townsfolk, travelling players, villagers, etc.. and lovely mins they are too.