The classic white button down. Something every woman needs but the fit is crucial.
Rule 1: Always, always, always try it on. You need to be able to move around, test the sleeve length and make sure there is no puckering.
Good things to remember:
-Bend your fingers so they touch your wrist (or as close as they go) this is where your sleeve should hit.
-Sit down. Are you giving visitors a show in between your buttons? Size up and take it to a tailor.
-Wear a white bra when you try it on. You shouldn't need to wear a tank underneath to camouflage your bra. The material should be thick enough to not show through.
-Are there collar buttons? If so, how sturdy are they? If you want a more professional look, try a shirt with collar stays, they will make sure you never have curling.
And something my mom taught me: if it's white, wash it with whites. A crisp white shirt is just that. White. A dingy, or graying white shirt is so unattractive!