This research focuses on financial flexibility for Taiwan listed companies on enterprise values between 2003 to 2019. The study delves into whether firm capacity directly impacts on enterprise values. Multiple regression analyses are performed with the inclusion of debt ratio and corporate governance-related variables. This research also studies the correlation between debt ratio and corporate governance to company size, in order to run threshold regression to analyze the value of company size to understand the impact of financial flexibility on enterprise value under different scopes. The results show that the financial flexibility correlates negatively with the enterprise value, which indicates that a high financial flexibility comes with small financial constraints, leading to a greater enterprise value. However, this statement no longer exists once the company size surpasses the threshold. In other words, financial flexibility has less impact scaling up, meaning it is more important for smaller companies.