The spinal epidural space is located in the spinal canal between the dura mater and the vertebral column. It extends from the foramen magnum to the sacral canal at S2/3. It is typically 4-6 mm in depth. The space mostly contains areolar connective tissue, epidural ligaments, semi-liquid fat, internal vertebral venous plexus, lymphatics, arteries, and spinal nerve roots. Clinically, this space is important for the delivery of medicine and steroid drugs.