The purpose of this study is to analyze the style of trousers of Koguryo(高句麗). Trousers of Koguryo were called Go(袴: trousers) and those had various forms according to the shape of gusset(dang, 糖), width and length of the trousers. Commonly the trousers that had worn by Koguryo people had gausset in those bottom not to be shown hip. The gausset was cut triangle or square so if a person wear the trouser with the triangular gausset, the trouser has a pointed hip. Sometimes the trousers had non pointed hips were dicovered in the wall-paintings of the Koguryo tombs, they are thought the trousers that had no gaussets or square one. And also there were another trousers that had wide/narrow legs and long/short legs. Trousers of wide legs were called Gwango(寬袴) and narrow legs Sego(細袴). Gwango(寬袴) grew wider over time and in the late age, the trousers were called Daegugo(大口袴) with wide ends were worn. Trousers were also decorated elaborately with patches on the edges, leg ties, vents, etc.
유희경, 김문자 (2000). 한국복식문화사. 서울: 敎文社, p. 13에서 재인용
김희정 (1994). 裙과 裳에 관한 연구, 서울여자대학교 대학원 박사학위논문, pp. 86-88. 김희정은 돈황에서 발견된 〈그림 17>에 보이는 下衣를 근거로 고구려인이 치마를 착용했다고 주장하고 있다. 그러나 사마르칸트 아프랍시아 궁전 벽화에서 볼 수 있듯이 먼 길을 가야하는 사신은 주로 바지를 입었다고 생각되며. 따라서 다른 회화작품에 보이는 사신들의 下衣는 고구려 말기 이전의 細袴였던 바지가 점차로 寬大해져서 大口袴로 변화된 것으로 이해하는 것이 보다 타당하다