Full size normal model shows semicircular canals and cochlea of the inner ear, auditory ossicles from the middle ear, tympanic membrane and temporal and tympani muscles. Model size: 3-3/4"x 2-1/2"x 2-3/4". Card size: 6-1/2"x 5-1/4". Base size: 6-1/2"x 5"x 1".