Uniform polystyrene microspheres are widely used in various scientific and industrial applications due to their consistent size and spherical shape. In biomedical research, they serve as calibration standards for flow cytometry and particle analyzers, ensuring accurate measurements of cell size and granularity. They are also employed in drug delivery systems, where their uniform size allows for controlled release of therapeutic agents. In diagnostics, these microspheres are used as carriers for antigens or antibodies in immunoassays, enhancing the sensitivity and specificity of tests. Additionally, they play a crucial role in material science, acting as templates for creating porous structures or as additives to improve the properties of composites. Their uniformity and versatility make them essential in precision-based applications across multiple fields.