<p>This question gets asked every year. Here is the answer I gave last year:</p>
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What to wear </p>
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<p>I can understand why people fuss over what to wear; its one of the things you can control completely in advance. I'm an EC (interviewer) and I have had people show up very casually and very formally. When I interview, I am trying very hard to put the candidate at ease (and to be at ease myself). The clothing should not interfere with that.</p>
<p>If you wear a suit all the time (that tiny, tiny percentage of HS students male or female) and you feel comfortable in a suit, there is no problem wearing a suit. If you never wear one, it is likely to make it harder for you to relax, and you will come across as uncomfortable. Anyone who has ever seen news footage showing some petty criminal dressed up in a suit for trial has encountered this. You definitely don't want the "defendant" look. </p>
<p>The opposite side of the coin is that you do want to show that you care about the interview. That badly ripped t-shirt and cut-off jeans may not work well with all interviewers.</p>
<p>Basically, you are looking for presentable, comfortable clothes in which you feel at ease. </p>
<p>Strong caveat: This is modified by both the interviewer (there are a lot of us, and your milage may vary) and by the location for the interview. I normally choose coffee bars for my interviews, but others interview at their offices, or almost any other location.</p>
<p>If you need to make a sartorial choice that you have some doubts about, or if you are genuinely unsure as to the appropriate clothing for the location, then ask the interviewer when setting up the interview ("Ummm... I'm coming straight from work, is it ok if I wear my Happy Burger uniform to the interview?" or "Given that the interview is at the beach, is a bathing suit appropriate?"). Both of these are exaggerated a little for effect; I am unaware of any beach interviews, but there may well have been one.</p>
<p>One last note, I want both people in the chat to be comfortable. Certain choices make that harder. As a rule, see-through clothing or very revealing clothing makes for a difficult interview. That applies for both men and women. It just makes it harder for both people to be at ease.
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<p>It also makes sense to look at Stuart Schmill's Advice on how to approach your interview: <a href="http://tim.mitblogs.com/archives/2005/10/advice_on_how_t.html%5B/url%5D">http://tim.mitblogs.com/archives/2005/10/advice_on_how_t.html</a></p>