It is important to make a good first impression at a job interview, before you say a single word at the interview; you have already made an impression based on how you are dressed. Here are guidelines given which are commonly accepted as appropriate for interviewing.
Men:
Women:
Note:
Dressing professionally shows respect for self, the interviewer and the company. You may not have to dress like this every day, but you are more likely to be taken seriously when you present yourself in a professional manner and take the time to attend to details.
https://careernetwork.msu.edu/jobs-internships/appearance-and-attire/dressing-for-interviews.html