thin sweater and a nice collared shirt with the collar carefully, yet nonchalantly poking out. always classy whether tucked in or not. your pants and shoes better damn match though, or youve RUINED your look. classy isn't about the collars and ties and such; it's about looking clean, organized, confident, and composed, but separated enough from the rest of the crowd to know you're different from everyone else. (sometimes the sweater and collared shirt defies this recommendation; however, if done well, you can make it your own.)
My roommate got some nikes for free from a friend. they're skatish looking, but have a sense of class to them. I don't wear classyish clothes too often at all cause they're a bit too preppy for me, but I look damn good when I do and those shoes give me a bit of a different appeal than my dress shoes which are overdressed in that situation, per se (depends on the pants/shirt, etc.)
Last of all, make your colors match, be more or less neutral (unless you're going for the flashy effect), and don't go for big and overly exemplified shapes/patterns. Don't look like the fuckin clash and be walkin around in a yellow shirt with blue pants, or plaid with a 1" grid. The oxford-sized grid is always classy and can always be manipulated with sophisticated complements to make it your own. Usually the stuff at the polo outlet is legit; however, if you're in the bargain section, the reason it's there is because it sucks and no one buys it for said reason. It you're a real G, go to Brooks Brothers; have them size you up with some shit, and get the classy shit there (my dad gave me a nice Oxford buttondown shirt from there for Christmas a few years ago and it's still one of the the best presents I've ever gotten. seriously, it feels and looks good--get the quality). From there, match it up with some more 'hip' contemporary stuff and make it pop in all the right areas for your own effect.
Last note: huge ass logos and graphics and shit like that are not classy or stylish or cool or even acceptable--straight malarkey worn by 7th graders who shop at pacsun, or the bro in your business class who supplies Hurley's bottom line an turns his hat 70 degrees to his right (unless OG they're graphics that are individually significant and are designed correctly). the real classy shit is representing you. It if has a logo, it's small, and is positioned so that it sits on you to to exemplify your best aspects (picture the rule of thirds in photography), not to mention it says, "hey, you know what I am, and you know that the person that i'm on knows what I am, shit's fo real." Most t-shirts have graphics dead center of the chest--boring and predictable as FUCK--put that shit bottom left or right or something, and make it something more than a damn logo. Give it Context, a story, something else than fucking Johnny's CrabShack.
This is just the start. It's more than just what the models wear; it's more than what your friends wear, it's more than what you see on campus. Combine all of the above plus everything else, and design your appearance. Above all, your personality is what shapes you, but keeping your clothing and grooming in line with how you act is like creating an outward example of you for people who don't know you (obviously this varies with situations). Follow these tips, add your own flare, emulate others, and you'll be straight rockin. and that's the goal.
(btw, i'm not super stylie or anything. I usually wear oversized stuff taht my sister says is 'hangy,' but it's comfy and I know when I want to look the steeze for whatever occasion and I know it looks good. Comfort is important above all, but when it comes down to it, the steeze and style will mesh and that's when you know it's the real steeze. know how to exemplify either for whichever occasion and you're set.) I don't know what the thread was about anymore, but go and get your mom to buy you some steezy shit. With this advice, you'll be flyin. or chillin at home on the couch on a friday night cause it's an april snowstorm and biking around town is out of the option and driving isn't worth it--steezin by oneself is more steezin than going out and lookin like that kook posted up with his headlights grindin up on a streetlight on the sidewalk on 5th street nah mean.