Guidelines for business attire
Conservative dress prevails in South Korean business culture.
Subdued, conservative colours are considered the most appropriate choices for the initial meetings. You can slowly introduce bright colours after you build your credibility and relationships. In business settings, standard attire for men includes a suit, a white shirt, and a conservative tie. However, recently more people, especially young people in their 20s and 30s, started wearing colored shirts and bright coloured ties. Professional women typically wear conservative business suits or dresses.
Sleeveless tops and miniskirts are considered unprofessional in most business settings. If you know you are going to a restaurant where you have to sit on the floor, avoid tight skirts. As a guest, dress conservatively, even for informal occasions. Some Koreans have started wearing sleeveless shirts and shorts for their outings.