Uniform polystyrene microspheres are widely used in various scientific and industrial applications due to their consistent size and shape. They are commonly employed as calibration standards in particle size analyzers and flow cytometers, ensuring accurate measurements and instrument performance. In biomedical research, these microspheres serve as carriers for drug delivery systems, enabling controlled release of therapeutic agents. They are also utilized in diagnostics as markers or labels in immunoassays, enhancing detection sensitivity. Additionally, uniform polystyrene microspheres are used in chromatography as packing materials to improve separation efficiency. In material science, they act as templates for creating structured materials or coatings with specific properties. Their versatility makes them valuable in both research and practical applications across multiple fields, including electronics for nanoscale structures, environmental science as fluid tracers, and education as teaching tools.