A cover letter should ideally be between 250 and 400 words, consisting of 3 to 6 concise paragraphs. This length typically takes up about half to one full page. For entry-level candidates, the sweet spot is closer to 200 words. The goal is to be brief yet informative, clearly introducing yourself and explaining why you are a good fit for the job without overwhelming the reader with too much detail. Short cover letters help keep the hiring manager's attention and increase the chances of progressing to the next stage of selection.