Business Casual for Women. Popular combinations often include a nice blouse with a blazer and black slacks, or a 3/4 length collared blouse and a skirt or a dress that’s about knee length or longer. Some offices allow jeans and polos as part of “business casual,” and others have even looser definitions. It depends on your workplace norms. Here’s how women are staying both fashionable and business casual in the workplace. See more ideas about Workwear, Classy outfits and Work attire.