jacket), boksam (복삼; 複杉), and wihae (위해; 尉解) in the Three Kingdoms period (57 BC – 668 AD).

[5] Although it is unknown when the term jeogori began to be used to refer to the garment, it is assumed to have appeared in the late Goryeo period around King Chungnyeol's reign.

The first historical document to mention the jeogori is in the Cheonjeonui (천전의; 遷奠儀) of Queen Wongyeong, which was a funeral ceremony for carrying the coffin out of the palace.

The document written in 1420 during the second reign of Sejong the Great records jeokgori (적고리; 赤古里) and danjeokgori (단적고리; 短赤古里).

The basic form of a jeogori consists of gil (길), git (깃), dongjeong (동정), goreum (고름) and sleeves somae: the gil is the large section of the garment in both front and back side and git is a band of fabric that trims the collar.

[13][14] The ancient jeogori had an open form, a collar which crossed to the left (좌임; 左衽), narrow sleeves, and was hip-length which were similar features found in the Scythian clothing-style.

[1] The change in collars direction from right-to-left (i.e. left closure) to left-over-right (i.e. right closure), along with the use of wide sleeves, which are found in many jackets and coats were due ancient Chinese influences; these Chinese influences on the jeogori are reflected and depicted in Goguryeo paintings.

[7] In the Joseon Period, jeogori lengths and style fluctuated depending on current fashion and social standing.

[7] The hanbok became more reserved for special events, such as ceremonial or bridal wear, which carries onto current time.