For most people, "button-down" and "button-up" are interchangeable. We use the term off-handedly whenever we need to refer to a dress shirt that has buttons up the front and buttons on the cuffs.

Shop similar striped blouses during the Amazon Spring Sale from $20. Kelly Clarkson, Drew Barrymore, Brooke Shields, and Mindy Kaling are wearing striped button-down shirts for spring.