One kind of abstract mannequin you might find in a department store has realistic parts but includes a prominent abstract feature. These are mannequins that have heads without a face. More realistic detail is shown in their bodies but the heads are just egg-shaped abstract components.
This type of mannequin is not concerned with realism at all. It is abstract in both head and body, and does not fully represent human form. In place of where the head should be, these mannequins only have a knob for a head, or just a swirl over the neck. Another non-human option is a robot-look.
Many store owners prefer abstract mannequins because they believe they are classier in appearance and against the norm. Any poorly made mannequin, even if abstract, will not appeal to viewers. Using true-shape mannequins is challenging because there is a high expectation for realism. Abstract mannequins are simpler in design and provide a classy display without this concern.
Fashion designers also prefer the simplicity of the abstract models; some designers think they help consumers pay more attention to the clothes. They are perceived as having more dramatic presence than their realistic counterparts, and are also utilized in boutiques and at trade shows.