Human Phenotype Ontology identifier HP_0000275 (Narrow face) can be described as follows. Bizygomatic (upper face) and bigonial (lower face) width are both more than 2 standard deviations below the mean (objective); or, an apparent reduction in the width of the upper and lower face (subjective). Also known as: Decreased breadth of face, Decreased horizontal dimension of face, Decreased transverse dimension of face, Decreased width of face, Horizontal deficiency of face, Horizontal hypoplasia of face, Horizontal insufficiency of face, Narrow facies.