Hi there - depth is 60mm and its for Hail Caesar - we don't go for the 24 figure unit size and just focus on the unit frontage - so that base is a unit - or more roughly 12 figures is a unit - but the way im basing i can reduce a little more and work on theme. I believe this works for Impetus as well
It still gives a good sense of size and scale - even with the reduced number of figures - there are a heap of shots on my blog of recent games -
http://wolftemplars.blogspot.com.au/ Thanks the compliments as well, love the feedback!
Cheers
JP