The pea-sized pituitary gland is composed of both anterior and posterior lobes; in adults, the vertical diameter is approximately 8mm, with the horizontal circumference found to be 12 millimeters ...

Review of the Anatomy and Physiology of the Pituitary Gland The adult pituitary gland weighs approximately 500-600 g and is typically 1.2-1.5 cm in diameter and 0.5 cm thick, occupying ...