* Field of study: A thesis in the humanities (e.g., history, literature) might be significantly longer than one in a field like computer science or engineering, where a strong emphasis is often placed on concisely presenting results. Humanities theses often exceed 200 pages, while STEM theses may be 100-150 pages, or even shorter.
* University and Department: Each university and even individual departments within a university will have their own guidelines and expectations. Some may specify a minimum or maximum page count, others may focus on the quality and completeness of the research rather than a specific length.
* Nature of the research: A large-scale empirical study will naturally require more space to present data and analysis than a smaller-scale theoretical project.
While there's no magic number, a common range often cited is 100-300 pages. However, this is a very broad estimate. It's crucial to consult your university's guidelines, your advisor's expectations, and the norms within your specific discipline to get a better understanding of what's considered appropriate. Focus on completing thorough, high-quality research; the length should be a consequence of that, not the driving factor.