Proportional equalance in all dimensions i.e transverse, vertical and sagittal, is the foundation for a well-balanced face. In a broader perspective, the vertical dimension is important in determining the harmony and esthetics of the face. Therefore, this study was conducted to evaluate the relationship between dental arch dimensions and vertical facial morphology in Class II Div 1 subjects as determined by the Jarabak ratio and examine the differences in dental arch dimensions between untreated male and female adults. Materials and Methods: Lateral cephalograms of 60 Indian patients in the age group 18-26 years were taken, The Jarabak ratio was measured on cephalograms of each patient. Based on the measured values, the subjects were divided into three groups – hypodivergent, normodivergent, hyperdivergent growth pattern. Study models were used for measuring the arch dimension. After using One Way ANOVA test, Student’s t-test, Post Hoc Tukey test we obtained the results. All statistical analysis done using the software, Statistical Package for Social Sciences (SPSS for Windows - Version 20.0): Results: After analysing the observations, the following results were obtained: 1)Arch perimeter is highest in normodivergent groups. 2)Intercanine, first intermolar is highest in normodivergent male groups. 3)First intermolar, arch length is highest in normodivergent female. 4)Overbite is highest in hypodivergent groups. 6)Palatal height and Jarabak’s ratio is highest in hypodivergent females. Conclusion: It was concluded from the study that the vertical face morphology and gender is associated with dental arch dimension. Thus, customization of archwires and using individualized arch wires according to each patient’s pre-treatment arch form and arch width is beneficial during orthodontic treatment.