Abstract: The invention relates to a set of office chairs, comprising a first species of office chairs and a second species of office chairs. The office chairs of both the first and the second species each comprise a pedestal to support the chair on a floor surface, a seat and a back rest. The first species of office chairs differs from the second species of office chairs with respect to the construction of the seat such that the seat of the office chairs of the first species is adapted to the male anatomy and the seat of the office chairs of the second species is adapted to the female anatomy.