All stands have a frontage of 45mm. Infantry stands are square. Close order cavalry stands are 60mm deep. Skirmish order cavalry stands are 90mm deep - you'll be surprised by the result I think.
A brigade of Spanish coronelas.
This one is eight stands strong. Four arquebus stands backed by two pike and two sword and buckler stands - in this case a total of 35 figures (the sword and buckler casualty takes up double the room of a live one!). This represents 1800 men (3 - 4 coronelas).
Landsknecht pike square
16 stands of Landsknect pike for a total of 96 pikemen. This represents about 5000 men.
This is a typical four stand unit of cavalry representing about 400 heavy cavalry.
A typical four stand unit of light cavalry representing 400 men. The unit has the same frontage as a heavy cavalry unit with the same numbers. This is because I believe light cavalry formed up in a 'cloud' rather than a regimented skirmish line; if they came to grips they would 'bunch'.
The photo below shows a heavy and light cavalry unit in combat. I think this works.