As an MBA admissions consultant I often have to take a step back with my clients. Over the years I have learned a lot from my clients and have come to realize that the definitions of proper interview dress or attire varies by region, country and even culture.

This is the deal, and I dissuade anyone from thinking anything to the contrary:

Wear a dark colored suit (Grey, Black, Charcoal) with a white or light blue shirt.
Wear a tie that has as little design or pattern in it at possible. Solid colored ties are good.
Wear shoes that are polished with dark socks. By shoes I mean dress shoes with dark laces, not “comfort” shoes, timberlands or Uggs. By dark I mean dark blue or black.
Do not wear anything that is tight-fitting or shows body parts excessively. This is an interview not a club.
Cut the tags off your clothing. Nothing says Men’s Wearhouse $199 special than tags still sewn onto the sleeve of a jacket. Don’t laugh too much, I have seen this as an MBA admissions interviewer. It tells me the applicant is clueless at worst or knows a good sale when he sees one at best.
Get a shave and a haircut……shower.