"By the way, Mr. Gatsby, I understand you're an Oxford man."

 Mia Farrow and Robert Redford in The Great Gatsby, 1974

There's nothing quite so perfect as an Oxford shirt. Spare, simple, and easy to wear, it works no matter your age, gender, or body type. And, perhaps more importantly, it's super-fun to buy one in every color and then throw them all over your bedroom floor (see above).

I've been on the hunt for one to call my own, and pretty much died when I found this version from La Garconne (whose selection of clothes is actually my version of heaven...but more about that later):

 

(Easy Shirt by Boy by Band of Outsiders) It's so crisp, I can't hardly stand it.

This Cropped Sleeve Shirt (again by Boy by Band of Outsiders) is also a contender...a bit more feminine, but still classic. Also, it's five dollars less (maybe because there's less sleeve?).