I wish that picture had something else next to it so I could get an idea as to how big it actually is.
Power connectors tend to be the same size wherever you are, so you can extrapolate from there.
You don't know how big a standard computer ATX power supply is?
the case is BIG - I would say 16cm height - 40 width - 50 length
taking 120mm each fan plus the PSU back(10x14cm)
thats it, now you all can start making the cabinets
and looks like thats an antec 650w PSU