Although augmentation rhinoplasty with silicone implant was once the mainstream technique, more complex rhinoplasty pro-cedures that focus on reshaping the nasal tip and columella are required to meet the customers' demands. After columellar control strut or septal extension graft have been introduced for the correction of the nasal tip and columella, the results of aug-mentation rhinoplasties were very good. But, the problem is the dimension of the septal cartilage which is used for the graft material. So, we dissected a total of 10 cadavers. The anterior- posterior dimension and the cephalic-caudal dimension of the septal cartilage were measured as if it were a rectangular shape. With using a 10mm L-shaped strut, a septal cartilage was mea-sured, too. As the results, we found that the anterior-posterior dimension of the septal cartilage was 22.1mm on average, and the cephalic-caudal dimension was 28.0mm on average. The average size of the septal cartilage was 627.2mm2. With using a 10mm L-shaped strut, the possible size of the graft was 226.2mm2 with an average anterior-posterior dimension of 12.1mm and an average cephalic-caudal dimension of 18.0mm. This report will be beneficial when the surgeon performs the various rhinoplasty techniques using the septal cartilage.