Background: A dilated venous channel called the coronary sinus drains blood from the majority of the heart. The present study performed metrical analysis of coronary sinus in human heart. Materials & Methods: 54 human cadaveric hearts were retrieved. The coronary sinus was measured for length and width at three different locations: its formation site (where the GCV joins the proximal designated tributary), its middle location (where the MCV enters the CS), and its termination point near the RA. A digital vernier caliper was used for these measurements. Results: GCV with LMV was present in 40 and absent in 14, GCV with PVLV was present in 12 and GCV with OVLA was present in 2 cases. The difference was significant (P< 0.05). The length of CS GCV with LMV was 57.2 mm, GCV with PVLV was 56.8 mm and GCV with OVLA was 20.3 mm. The difference was significant (P< 0.05). The valve of CS was present in 39 and absent in 15 cases. Conclusion: The formation of the coronal sinus varied among 54 human hearts that were kept in formalin. The Coronary sinus opening in the right atrium is primarily oval in shape and is protected by a semicircular valve.