<p>Laparoscopic sleeve gastrectomy (LSG) is the most common surgery performed as a first stage in the surgical treatment of morbidly obese patients. The aim of this study was clarified as investigating the effects of resected gastric weight (RGW) on postoperative weight loss, waist and hip circumference, laboratory parameters, and complications. A total of 60 patients who underwent LSG between September 2020 and December 2021 in our clinic were retrospectively included. Patients were separated into three groups according to RGW (Group I: 90–149 g, Group II: 150–174 g and Group III: 175 g and above). Demographic characteristics, co-morbid diseases, intraoperative and postoperative data of the patients were collected. In the study, the mean RGW was 160.7 g. Group III had significantly higher male gender distribution, diabetes mellitus prevalence, and preoperative HbA1c levels compared to the other groups (p &lt; 0.05). Insulin resistance was significantly more common in Group I (p &lt; 0.05). At postoperative one year, the reduction in waist circumference was significantly more pronounced in Group III compared with the other groups (p &lt; 0.05). RGW alone is not a definitive predictor of postoperative weight loss after LSG. However, greater RGW was associated with more pronounced one-year weight loss and BMI reduction. We believe that postoperative outcomes are influenced both by reduced ghrelin levels and residual gastric volume, making the remaining gastric tissue more relevant than the removed portion. Monitoring waist and hip circumference in addition to BMI is recommended in postoperative follow-up.</p>