What is a professional attire?

honestly speaking, I would idealy prefer dressing casually for an interview such that I would be at ease and fare well in the interview. However, it has become a part of corporate cultute to judge the interviewee on the baisi of his/her attire- it becomes essential to atleast wear a ie and smart, uncumpled clothes as well as well polished shoes and neat hair style etc. Most of my friends who attend interviews suggest waruing suits as it projects a bette image-that the interviewer would take u far more seriously and conside u more reponsible. Try it and let me know....i havent till date. If u do pls updat me too. Cheers and all the best