Wikipedia
Binyeo
A binyeo ( hangul: 비녀; ) is a Korean traditional hairpin for fixing ladies' chignons. Its main purpose is to pin the chignon in place, but it also serves as ornamentation, and it has different usages or names according to its material or shape. Binyeos are divided into two kinds, a jam ( hangul: 잠; hanja: 簪; ) and a che ( hangul : 채; hanja: 釵). Jams have a long body and ches have a ∩ shape. Binyeos are usually used by women, but they are also used by men to fix their sangtus (Korean topknots) in place.