1. ENSURE THAT YOUR TAILORING FITS WELL
Because it's the foundation of your outfit
When the question of what to wear to an interview arises, most commonly the nature of the question is one of what it is that should be worn, rather than how it should be worn. A suit will always be the cornerstone of men's interview attire, and no matter the colour (we recommend navy by the way) if your suit doesn't fit well, your interview outfit won't leave a positive impression.
Not only does a suit that's too tight or too large look blindingly obvious to interviewers, it'll feel uncomfortable to wear and therefore scotch any of your attempts to look perfectly composed. If you don't want the expense of having your suit tailored to your specific requirements (a small luxury that every man would benefit from) make sure that whenever you're buying off-the-peg you consider these rules of thumb.
1. A modern fit - rather than classic or slim - is your safest option
2. Your blazer's sleeves should show just a fraction of your shirt cuffs
3. Your blazer's shoulders should not extend past your own
4. Approximately, there should be one inch of break (where the bottom of your trousers fall on shoes) at the hem of your trousers
5. A hand inserted flat under your lapel should fit comfortably, clench to a fist and your suit's top button should strain, if this isn't the case your suit is either too small or too big