Umbilical hernias are a common surgical disorder in buffalo calves and can vary in their causes and treatment. While herniorrhaphy is a reasonable option for smaller hernias, larger hernias with diameters greater than three finger widths typically require the use of prosthetic materials for a successful and tension-free repair. This study aimed to evaluate the effectiveness of using a double layer polyester mesh to repair umbilical hernias in ten buffalo calves with a large hernia ring of a diameter of 7-11 cm. The study found that the use of a double layer of polyester mesh was successful in repairing hernias without any complications. Ultrasonographic examination was performed daily to assess the healing progress of the hernias. The use of a mesh allowed for tension-free repair and reduced the risk of recurrence. This technique may be a useful alternative for repairing larger umbilical hernias in buffalo calves. Overall, this study highlights the importance of using appropriate techniques for repairing umbilical hernias in buffalo calves, particularly when dealing with larger hernias. The use of prosthetic materials, such as a double-layer polyester mesh, can provide a successful and tension-free repair, reducing the risk of complications and recurrence.