Background/purpose: This study aimed to investigate the predictive ability of thinking styles (synthetic, idealists, pragmatists, analysts, and realists) in the level of self among undergraduate students at Al al-Bayt University in Jordan and to identify the prevailing thinking styles. Materials/Methods: The study included a sample of 357 undergraduate students from Al al-Bayt University. The self-scale and the thinkingstyles scale were administered after proper validity and reliability procedures were ensured. Results: The findings revealed that the level of self among students was high. The prevailing thinking styles, in order, were realists, analysts, pragmatists, synthetic, and idealists. Thinking styles collectively contributed to explaining 19.1% of the variance in the self-scale, with the realistic style accounting for 17.9% and the synthetic style explaining an additional 1.2%. Conclusion: The study highlights the significant role of thinking styles, particularly the realistic style, in predicting self-level among students. These findings provide valuable insights into the relationship between thinking styles and self, offering implications for educational practices and student development.