[1] The wonsam originated from China and is believed to be one of the clothing of the Tang dynasty introduced in the Unified Three Kingdom periods of Korea.

The formative characteristics of the wonsam can be divided into four stages:[7] The color and decorations of the garment around the chest, shoulders and back represent the wearer's rank.

[12] Unlike the po, an indigenous Korean overcoat with narrow sleeves, the wonsam was based on women’s half-sleeve round collar robe that was worn in 15th century.

[verification needed] As an adaptation from the original model, the wonsam gradually evolved into a distinctive form characteristic of traditional Korean clothing.

[8] Today the wonsam is worn primarily in representations of Joseon royal ceremonies and as a wedding garment, and in a much simplified version when performing traditional Korean dances.