Asking about company dress code is a perfectly good question, and it's one part of understanding the company's overall culture. Any sane recruiter or hiring man

Asking about company dress code is a perfectly good question, and it's one part of understanding the company's overall culture. Any sane recruiter or hiring manager wants you to understand and be attracted by the company culture, and will be happy to answer questions about that sort of thing. Furthermore, they may give you brownie points for asking since it shows you are interested in making a good impression and in understanding the nature of your job on the whole.