This is for 15mm? The bases can be as thick as you like (ie 1mm, 1.5mm, 3mm, etc).
For version 2.2 footprints are:
Cav is 40mm wide by 30mm deep
Aux/MF is 40mm wide by 20mm deep
HF is 40mm wide by 15mm deep
Camp I think in version 3 has set dimensions (didn't in v2.2), I can't find my copy of the rules but it'll be less than 160mm.