The blocks are 10 inches thick by 14 feet long. After the foundation is sealed, the blocks will be attached to the outside of the wall from the footing up to the sill.  This will complete the outside layer of insulation that completely separates the foundation from the surrounding soil. Blocks will also go under the slab.  The white foam is EPS. The darker blocks are Neopor from BASF, a graphite-enhanced EPS with higher R-value.