Once you've landed OCI (on-campus interviewing) appointments, it's time to start preparing for them. As the saying goes, you never get a second chance to make a first impression, and that's why knowing what to wear to the interview is extremely important. Be sure to also check out 20 Common OCI Interview Questions and 10 Questions to Ask During OCI for more tips on preparing for your interviews.
Overall, you should dress conservatively in traditional business attire and avoid extremes (overly bold prints, really short skirts); although some firms may have business casual dress codes, you should never assume that also applies to interviews as well.
Also, although you don't need to make an appointment at a hair salon prior, you should be as well-groomed as possible -- clean, hair combed, clean-shaven for men, etc. Go easy on the perfume, cologne, jewelry, and other accessories.
Some specific guidelines for what to wear for OCI are as follows:
Men: Wear a wrinkle-free suit. It doesn't matter what color, although again you should err on the side of conservative, so dark and/or neutral is best. A dress shirt underneath and a middle-of-the-road tie will complete your outfit. Some people want to make statements with their ties, but generally this is ill-advised.
You may be able to get away with a sports jacket and even dress pants, shirt, tie and no jacket (if it's spectacularly hot, for instance), but a suit is definitely your best option. Dress shoes and dark socks will complete your outfit.
Women: A wrinkle-free suit with a skirt or pants is optimum, although, like the men, you could also do a skirt or dress pants and a dress shirt.
Although a current fashion trend is no pantyhose, it is still advised that women wear nude pantyhose for OCI. Closed-toed shoes with a low to medium heel will complete your outfit.