Double Unit Sizes (Double Monsters!)
Increases the number of men in a unit, and the number of monsters, by 2x. This also increase the number of artillery pieces and the health of characters by the same amount.
I also have 1.25x and 1.5x (and a mod that increase the health of monsters by 2x instead) unit sizes mods at the links below.
1.5x
https://steamcommunity.com/sharedfiles/filedetails/?id=1283680478
1.25x
https://steamcommunity.com/sharedfiles/filedetails/?id=1662026891
2x
https://steamcommunity.com/sharedfiles/filedetails/?id=1159191957