The size of dendritic cells can vary depending on their subtype and activation state. Generally, dendritic cells are considered to be relatively large immune cells, with a typical diameter ranging from 10 to 30 micrometers (μm), which is equivalent to 10,000 to 30,000 nanometers (nm). However, dendritic cells can also exhibit processes or extensions that can increase their overall size and shape complexity. The size of dendritic cells may also change during activation or maturation, with increased surface area and complexity to better engage and communicate with other immune cells.