Everyone in first year tries to outdress everyone else.
By the time they get to 4th year, you can't tell whether they're students or homeless.
The point is don't try to stand out by dressing fancy. Just make sure your hygiene and hair are good, your shoes are nice and clean, and your clothes fit your body shape. That's all you need as an undergrad, in my opinion.
Don't drop a ton of money on clothes now because you likely will change your style in a few years. Oh, and a...