Shindo 301 plinth demensions L x H x D in inches

I'm interested in constructing a Shindo 301 plinth and I need the original demensions(L x H x D in inches).

The height info that I need to know is the total height of the plinth(no spikes) and the total height without the smaller base on the bottom.

I knew the smaller base under the plinth is a piece of hardwood. Do u know what kind is it ?