AIM: To explicate bilateral morphological inequality & morphometric measurements of the Carotid canal (Ext. Aperture) in human adult skulls Material and methods: Study was carried out in 200 cranium (unknown sex) of Indian population. Disparities in Shapes of Carotid canal (Ext.Aperture) were noted & Digital vernier callipers is used to appreciate Anteroposterior&mediolateral diameters of both sides from which Areas were procured& evaluated statistically. Observation & Results:.Round shape of Carotid canal (Ext.Aperture) was observed in 54% , oval shape in 28% & almond in 18% of the crania. Dimensions for the right side (APD, TD& Mean) were 6.8+ 1.27mm,5.94+ 0.91mm ,31.89+ 8.37mm and the left side were 6.77+ 1.39mm,6+ 0.91mm ,32.16+ 8.33mm respectively. CONCLUSION:Awareness of carotid canalmeasurements could assist neurosurgeons in surgical operations, the clinicians in radiographic scrutiny, & also for the clinical anatomists and the forensic experts in their routine practice