A closer look behind the scenes of film making and media science reveals that the costumes used in film productions are products of a complex construction process. The costume designer has to put a lot of creative and investigative effort into the creation of costumes to provide the right clothes for a particular role, which means the costume reflects the place and time of play as well as it shows understanding of the characteristics of the role, actor and screenplay overall. Consequently, the creation of a costume is a difficult problem that is more or less occurring often, whereas the frequency of problem occurrence strongly depends on the genre and specifics of the film. For the genre of Western films, for example, the costume of a Wild West Sheriff is qualified for identification and description as a pattern because it appears frequently. In this paper, we propose a pattern language for composing costume patterns through a rich set of composition operators, more fine-grained costume patterns, and costume primitives. The pattern language aims at supporting media science, costume design, and costume management through providing a basis for the development of advanced information systems assisting the management of costumes considering their inherent structure and relations between their constituent parts. Our pattern approach is exemplified through deep-dive modeling of two costume patterns.