Corporate Social Responsibility (CSR) is when companies make an effort to improve society through their business practices. Corporate Social Responsibility is a growing topic and has been researched extensively and implemented mostly among large corporations, garnering the attention of stakeholders, sponsors, investors, and media. Researchers have conducted meta-analysis on the effects of CSR on financial performance of companies and found that though implementing CSR activities can result in an expense for the company, the overall benefits of CSR, such as increases in public support, employee satisfaction, investor’s involvement, and community engagement, far outweigh the cost. However, little is known on the impact of the size of a company and the effects of CSR and financial performance. The goal of this research is to identify, based on the size of a company, the effects of CSR on financial performance and examine whether CSR results in financial benefits. Data will be extracted from three large, three medium, and two small profit companies and analyzed following existing protocols and procedures for conducting a systematic review. For each company, I will examine its CSR report and identify studies that used more than two outcome measures (e.g., environmental sustainability, human right advocacy, empowering employees, etc.) of CSR to determine financial performance. The significance of my research is its potential to provide context-specific findings that could inform managers from small to large companies how engaging in CSR activities may be beneficial.