Free-standing, N-graphene sheets fabricated by microwave plasma at atmospheric pressure conditions are the material under analysis. To measure the electrical conductivity of the graphene, N-graphene sheets were pressed into tablets. Van der Pauw method was applied to determine the longitudinal electrical conductivity of the assembled N-graphene sheets. Additionally transversal conductivity was also determined by two contact scheme. SEM imaging shows that the graphene compacts consist of agglomerates, built up from many primary flakes or sheets mostly oriented parallel to the tablet plane. The measured electrical conductivity depends on the orientation of the current – the longitudinal is an order of magnitude higher than the transversal according to the orientation of the graphene sheets (flakes) in the tablets. Aditionally, the electrical conductivity is found to depend on the tablet’s density. The application of pressure increases the conductivity basically by enlarging the contact area between the flakes, however, pressure-induced rearrangement is also observed. The high electrical conductivity with values in the order of 103 S/m should be noted being much higher than the reported values of graphene sheets obtained by chemical methods.