Menswear has all these rules, and if you don't follow them, sometimes you look stupid. We say sometimes because rules are meant to be broken, but only once you know them. Habitual menswear rule-breaker, Thom Browne has given tailored clothing fans a brief guideline on how one should dress—included in the list are jacket sleeve and trouser length, how to button a cardigan (if worn with a suit), and how to wear a topcoat. Take a look through the images, and figure out which rules you're going to break tomorrow.

[via Four Pins]