For graduations, little sibling's piano recitals, church services, and anything else that has a dress code somewhere between a suit and casual clothes, the oxford shirt is a staple of white boy style. It's always in a light French blue, and it always has a buttondown collar. However, it doesn't always fit. 80% of the time, it looks like a sack. This is called a "classic fit," and anything tighter will get you made fun of in most flyover states.
American Living Oxford Shirt
Buy It Now at J.C. Penney, $30