This study investigates the effects of formality of dress on ratings of classroom presentations. Participants (N = 65, 66% women) from a Midwestern university in the United States rated three female students giving a presentation designed for a health psychology class in one of four outfits: casual, party, business casual, or business formal. Participants rated the business formal-dressed presenters higher than both casual and party-dressed presenters on overall presentation quality but not higher than business casual-dressed participants. Our results provide strong empirical evidence that dressing formally not only influences presentation scores but also suggest that students do not completely recognize how clothing differs in appropriateness for presentations.