For the last 14 years, Ellie Uyttenbroek and Ari Versluis have been documenting the informal dress codes of numerous social cliques, and platonic ideals. The resulting work, Exactitudes, is beyond exhaustive, introspective and revealing:

By registering their subjects in an identical framework, with similar poses and a strictly observed dress code, Versluis and Uyttenbroek provide an almost scientific, anthropological record of people’s attempts to distinguish themselves from others by assuming a group identity. The apparent contradiction between individuality and uniformity is, however, taken to such extremes in their arresting objective-looking photographic viewpoint and stylistic analysis that the artistic aspect clearly dominates the purely documentary element.

There’s a book as well.

Thanks, BuzzFeed.