what do austrians usually wear
Austrians tend to wear clothing that is quite formal and stylish. Very smart casual or smart business orientated clothes will carry you through for business, sightseeing and for eating out. Dark colors are generally more popular, as are solid colors. No t-shirts, no baseball caps, no athletic/exercise suits - unless of course you are exercising.
Austrian women generally don't wear jeans, except perhaps in the evenings at an outside venue but definitely not during a working day. By far the majority of women wear dresses and skirts. Keep to low key but quality jewelry. Save high heels for the evenings. A stylish pashmina or shawl is a must-pack item.