Now the 18mm scale goes like this:
Close order foot: frontage 10mm, depth 15mm
Light medium infantry; 13 and a third mm, 20mm
Light infantry; 20mm and 20mm
these then bacame the standards for the 'elements' of DBM rules
Super heavy catapharacts; 10mm, 30mm
medium & heavy cavalry; 13 and a third mm, 30mm
light cavalry; 20mm, 30mm
elephants; 27mm, 40mm
4 horse chariots; 40mm, 40mm