Luster decoration is a thin layer of copper and/or silver nanocrystals dispersed within the glassy matrix. Color and shine of luster decorations depend on absorption and reflection of light. The sizes of metallic nanoparticles have an important effect on interaction of light and these particles. The quality of the thing is seen is related to amount of absorption and reflection light. In this paper different luster raw paints are applied over a tin-opacified glaze and then the samples was fired under suitable oxidation and reduction atmosphere. The sizes of formed nanoparticles in lusters with different color and shine were investigated. Scanning Electron Microscopy-Energy Dispersive Spectrometry (SEM-EDS) and Field Emission Scanning Electron Microscopy (FE-SEM) was used to quantitative analysis and determination of nanoparticle sizes. Experiments showed that color and average size of metallic nanoparticles depend on luster raw paints and the presence of copper in raw paint reduces the size of nanoparticles.