At 28mm, 200mm(Approx) squared, the larger modules fit into a standard printer bed.(220mm) It would be easy to scale down to 25mm by scaling the model down by 10%, but increasing the scale to 32mm could be more troublesome. To increase the scale to 32mm, you will need to scale the model up by 15%, but you will need a larger print bed than the standard 220mm.
The statues are approximately 40mm scale and come ready to print, baseless and without the need of support. Use similar setting as those used when printing miniatures. Try as close to 100% infill, use the smallest nozzle you can, typically between 200 and 400 microns, with a layer height or 100 microns or lower. The statues are sculpted with chisel angles as if cut in stone, so detail is minimal and they should print very nicely with a .4 nozzle. The rendered images may look inflated,(Fat) but this will minimise when printing in FDM and is done purposefully to produce nice stout statues, rather than lanky ones.(Thin and long) I recommend you base primer the statues in medium grey and dry brush with white, this will produce a very fast stone finish that will look awesome on your diorama.
Very little infill is required, try 5% for most modules, but make sure you add plenty of top layers if doing this. All modules have been tested at 10% infill rate.
Some of the modules will print near to 170mm tall so make sure your printer has the appropriate range. Use a layer height of about 200 microns or below, if time is not a factor. There is a lot of detail on the vertical surfaces and you will gain a lot from using a reduced layer height setting.
Once the modules are completed, it would be a good idea to sand down the surfaces that are to come in contact or to be stuck to other modules. This will ensure minimum gap between modules and a good surface if permanently glueing them together.