threemae, there are very few never-going-to-change rules for interview dress, but the question I always ask interviewees (friends and family who ask for my opinion) is “How badly do you want this job?” Because if you really want the position, you’ll need to beat out all the other potential candidates. Which means you’ll need to make the best impression on the interviewer based upon those few minutes that the interviewer will take looking at your appearance. Which may mean following a bunch of rules in addition to the basic ones.
The goal of interview dress is to walk that fine line between, “I took the time to present a neat, well-groomed, professional appearance” and “Hey look, I should be on the cover on GQ.” Discounting my user name for a moment (ow, the pun), here’s my take on how not dress like a pirate:
Suit - charcoal gray is fine. Stripes are fine if they don’t scream from a distance. The BR example you showed is fine. I am more in line with Dewey Finn and EJsGirl, though. If you have the budget, go to Nordstrom, Men’s Warehouse, or Jos Bank and tell the salesperson that you need a suit for an interview. Salespeople at these places assist people in your situation on a regular basis.
Still, $200 for a suit (with matching pant, right?) is a great deal. In any case, make sure that the suit is in your size. On a related point, definitely get your suit (no matter where you bought it) tailored. Yes, you’ll have to pay for it, but tailoring can work miracles on any suit. Suits (unless they’re bespoke) are designed to fit the 50% population profile, so unless you are literally an “average American”, tailoring will provide a benefit.
White shirts are fine; depending on your skin complexion, off-white (cream or ecru), or pale blue may work better. Again, size and fit are key. You should be able to button the very top button and still fit a finger or two behind the button without choking yourself. Shirt sleeves should stick 1/2 inch out of your suit coat (cite, and yes, tailors will alter shirt sleeves). Shirts should have straight or wide collars.
As Jurph said, avoid so-called “button-down” shirts that give a more preppy look. (Yes, I know Brooks Brothers made them popular, but they have a tendency to make the tie knot look as though it wants to jump free of your neck.)
If you can afford it, get a 100% cotton shirt then get it professionally laundered and pressed. Cotton-polyester blends are tolerable, but all-cotton shirts breathe more and are more comfortable in the long run. Rayon or satin-like shiny shirts are out.
Tie should show contrast against the shirt; typical interview ties are shades of red or blue. Avoid pastels, black, or solid grays.
Lace-up shoes are the norm. Get them polished. Experienced interviewers look at your shoes out of habit to see if they’ve been shined.
Belt color must match your shoe color. Doesn’t matter if Kenneth Cole, Ralph Lauren, or Lord Versace himself breaks this rule.
Socks should match either the shoe or (preferably) trouser color.
Non-clothes stuff: hair should be neat, mustaches and beards either shaved or trimmed, nails should be clipped. (Filed nails is a plus; most businessmen I know file their nails and car salespeople look for filed nails as an indicator that their customer is a business professional.)
Because of potential allergic reactions, interview books discourage the use of colognes. However, if you are like many people (including me) and use a cologne, apply it sparingly. Take a cue from the Densha Otoko TV series: spray the cologne on your wrists and rub them together.
I know the above looks like a laundry list for “How to be a metrosexual.” But these are the things most interviewers make judgements on during their first (and possibly only) impression.
By the way, Full Metal Lotus’s advice is worth bearing in the corporate world: dress one or two levels above regular staff and/or dress as the same level as your potential boss. If you are serious on a promotion (I know this is a med-school interview, but it never hurts to practice early), kick it up another notch and dress like your supervisor’s supervisor. I know it sounds superficial, but when you are networking with people from all different management levels and you look like a manager, people will treat you like one (until they find out otherwise, but that’s a different story).
If you want visual examples, try 007 (you don’t need cufflinks although they are more popular in Europe), Ask Andy About Clothing, or even Stephen Colbert (I kid you not).
The upside of all this is that whether you get the position or not, you can wear the same outfit for future interviews as well. Interview dress is on the conservative side and therefore won’t go out of fashion for quite a while.
Best of luck!