Microspheres are tiny spherical particles that typically range in size from 1 to 1000 micrometers. They can be made from various materials, including polymers, glass, and ceramics. Due to their small size and large surface area, microspheres are used in a variety of applications, such as drug delivery, diagnostics, and as fillers in cosmetics. In the medical field, microspheres can encapsulate drugs, allowing for controlled release into the body. They are also utilized in biotechnology for imaging and as carriers for vaccines. Their versatility makes them valuable in both research and commercial products.