Inkjet printing is among the most promising techniques that are compatible with roll-to-roll processes. Conductor and semiconductor nanocrystal inks are typically used for directly writing devices on arbitrary substrates. A popular choice for conductor inks is silver nanoparticles for their good balance of cost and performance. Here we report the characterization of silver nanoparticle inks with small particle size (2 to 10 nm) and narrow size distribution using a variety of techniques including electron microscopy, small angle neutron scattering (SANS), UV-Vis absorption, x-ray diffaraction, etc. SANS has the unique capability of measuring the dimension and the dispersion of both the silver cores and organic shells in inks. Because of the small size of nanoparticles, printed patterns can be processed at very low temperatures (< 150°C) while resulting in conductivity of sintered films comparable to that of pure gold.