I'm visiting all you pre-meds from residency interviewing land, hoping to help you shed your bad habits early. You would not believe the awful clothing-related atrocities still perpetrated by 4th year medical students applying for residencies.
1. It is not acceptable to wear anything that looks remotely like this with your suit:
2. Please remove the tailoring string from the vents in the rear of your suit (whether it's a single or double vented suit). We know you bought your suit solely for this interview, but you don't have to flaunt that fact.
3. Charcoal or navy are excellent suit choices. Black suits, aside from being ugly and generally inappropriate, scream "I AM A PREMED AND I DO NOT UNDERSTAND MEN'S ATTIRE AT ALL." Do yourself a favor and buy a suit you'll actually want to wear at other functions in the future other than a funeral.
4. Button-down collars are pretty much the least formal type of collar there is. Pinpoint or spread collar should be your only real choices.
5. Socks match the trousers.
6.
NEVER BUTTON THE BOTTOM BUTTON OF YOUR SUIT JACKET. EVER.
7. Please get your suit tailored. Even if it's by the 30-minute tailoring by some Korean lady in the mall. Your pants should not bunch up at your ankles, and your coat sleeves should not suffocate your hands. Your shirt sleeves should peek out about 1/4 to 1/2 inch past your coat sleeves.
8. Avoid patterns on all 3 elements of your dress (suit, shirt, and tie). Striped suit, striped shirt, and striped (or any pattern) tie is too busy and generally frowned upon. If you MUST wear a pinstripe suit, make sure either your shirt or your tie (or both) are solid colors.
9. SLIP-ON SHOES ARE NOT ACCEPTABLE. WEAR LACE-UP OXFORDS.
10. Speaking of shoes, you should consider investing in a pair of nice shoes. They don't have to be Allen-Edmonds (although you can get lightly used pairs on ebay for super cheap), but consider Johnston and Murphy or Cole Haan. Cap-toe balmorals like the picture below are the gold standard. Moc-toe shoes could work in a pinch, but are less formal. Leather soles should be your only consideration. Dress shoes should not ever have rubber soles (but again, this is all predicated on your willingness to spend >$100 on a pair of shoes, which many will not want to do even though they will last you nearly a lifetime).
11. Belt and shoes should match (if not exact, nearly exactly).
12. For charcoal or black suits (if you didn't listen to my advice earlier and got a black one), black shoes/belt.
13. For navy suits, black shoes/belt, or burgundy/cordovan if you want to spruce it up a bit. Both are acceptable. A dark brown/chestnut is acceptable, but considered slightly less formal.