Abstract Purpose: The obtaining on the accurate mesh size is the key for the good results and making the procedure easy during laparoscopic hernia repair. This study offers a modified transabdominal external needle technique to achieve this goal. Methods: During the period from February 2011 through October 2013, during laparoscopic inguinal hernia repair in 41 patients, the mesh dimensions were determined by novel technique. Where, the mesh size was calculated percutaneous transabdominal by using spinal needle No. 22 with thread inside it. The mean follow up period was 24 months. Results: The ages of this patients group were ranged from 21 to 65 years (mean, 49 years). The mean time needed to obtain the accurate mesh dimensions was 3 min. No recurrence or mesh bulging or mesh infection were recorded in this patients group during the period of follow up. Conclusion: Our technique for calculation of mesh dimensions during laparoscopic hernia repair is accurate, safe, and easy.