The purpose of this paper is to study the effect of size-variation of EuMnO3 particles on Nuclear Magnetic Resonance (NMR) phenomenon. The EuMnO3 particles have been synthesized through solid state reactions resulting in micrometer (μm) particle sizes (designated as bulk). The particles have also been synthesized through sol-gel combustion resulting in nanometer (nm) particle sizes which have been designated as 'nano'. NMR spectral measurement, SEM & TEM imaging were used to characterize the resultant manganite ceramics. We compared both bulk and nanoparticle samples using NMR spectroscopy. In general, the NMR spectral line width showed a general broadening trend as the size decreased. But there was also evidence of a size dependent effect in chemical shift and in the spin-spin relaxation. The investigated details include the structure, homogeneity and particle size.