Background: Accurate morphometric data of the aortic arch and its branches are essential for planning surgical and endovascular procedures. Population-specific reference values accounting for sex and age are particularly important for optimal device sizing and procedural planning. Aim: To determine the morphometric parameters of the aortic arch and its branches and evaluate their relationship with sex, age, and branching pattern type. Materials and Methods: A cross-sectional study was conducted on 120 formalin-fixed adult cadavers (72 male, 48 female; mean age 56.42 ± 14.28 years). Morphometric measurements of the aortic arch including diameters, arch length, branch diameters, and inter-branch distances were obtained using digital Vernier calipers. Independent t-tests, one-way ANOVA, and Pearson’s correlation were used for analysis. Results: All morphometric parameters were significantly larger in males than females (p < 0.001). The mean aortic arch diameter at origin was 28.45 ± 3.12 mm in males versus 25.78 ± 2.89 mm in females. Significant positive correlations were found between age and aortic arch diameter (r = +0.412, p < 0.001), arch length (r = +0.345, p < 0.001), and branch diameters (p < 0.05). The brachiocephalic trunk diameter was significantly larger in the bovine arch group (14.89 ± 2.12 mm) compared to the standard pattern group (13.45 ± 1.89 mm; p = 0.023). Inter-branch distances did not correlate significantly with age. Conclusion: Significant sex-based and age-related differences exist in aortic arch morphometry. These population-specific reference values are valuable for sex- and age-adjusted procedural planning in surgical and endovascular interventions.