Introduction: The dimensions of FM have clinical importance because the vital structures that pass through it may suffer compression as in cases of FM achondroplasia and FM brain herniation. In neurosurgical practice, the transcondylar approach is commonly used to access the lesions which are ventral to the brainstem and cervicomedullary junction. It was reported that understanding the bony anatomy of the condylar region is important for this approach. This study puts in an effort to understand the morphometry of the foramen magnum. Material and Method: The present study was carried out on 40 dry human skulls of unknown age and sex from Kanachur Institute of Medical Sciences, mangalore and continued in Rajasthan in the department of JNUIMSRC,Jaipur, Rajasthan. All the measurements were taken with the help of digital verniercalipers. Results: The foramen magnum was studied for its morphometry and dimension. Foramen magnum with different shapes and size were found. The mean antero-posterior diameter was 34.36 ± 3.13 mm, the transverse diameter was 28.48± 3.97 mm, area was 773.53 ± 154.359mm2 , and the FM index was 1.2345± 0.180. The FM shapes were determined as oval (22.5%), egg-shaped (12.5%), round (17.5%), tetragonal (12.5%), pentagonal (12.5%), hexagonal (10.00%), and irregular (12.5%). Conclusion: This study will be useful for surgical approach for the Neurosurgeon and Orthopaedic surgeon.