3. A pocket square adds an extra level of polish, but make sure it doesn’t match your tie in either pattern or fabric choice.
Before you go totally conservative, remember that the pocket square is where you get the most freedom and the one place you get to add a little pizzazz to your suit.
5. A collar gap between your jacket’s lapels and your shirt’s collar can signify an ill-fitting jacket.
It’s complicated. Read more about it here.
11. If you’re going for more formal business attire, opt for a double-button, notched lapel jacket.
13. You should be able to slip your hand between your chest and your buttoned jacket such that it feels snug, but with room to move.
14. Always unbutton your suit before sitting down, or you risk ruining it.
16. Always go with the classic windsor knot for your tie, but use the size of your head to determine whether you should go half or full windsor.
BIG HEAD = FULL KNOT. SMALL HEAD = HALF KNOT. If you’re not sure how your head size compares, ask one of your male friends. They should be able to give you an objective opinion.
18. There are practical reasons for vests beyond just how they look.
A vest is best worn with single-breasted suits (so it’s actually visible). if you’re going to be wearing your suit in a cold climate, a vest can add a lot of warmth. It also adds a formal touch to your suit.
20. When you get your suit home, you’ll need a seam ripper or a small, sharp pair of scissors.
Unstitch the jacket’s pockets, remove the tack stitches from the jacket’s vents, and remove the little embroidered label from the jacket’s left sleeve. Do this very carefully to ensure you don’t actually rip the fabric or neighboring threads.
24. Your tie should JUST reach the waistband of your trousers, or be slightly shorter.
26. If you sweat a lot, wear an undershirt.
Preferably one with a deep neck so it doesn’t peek through. Nothing will cheapen the appearance of a suit more than a glimpse of undershirt.