 Kramers wardrobe of mostly 1960s and 1970s clothing was not  intended to make him into retro fashions, so much as to suggest that  he hadnt bought clothes in several years. The pants in particular  were always about an inch too short in order to stress this. In  later seasons, appropriate clothing became increasingly difficult  for producers to find, due to the combination of it getting older  and older as well as the extreme popularity of Kramer as a  character, forcing them to have tailors personally make Kramers  clothing out of retro fabrics. Often, they would create numerous  back