Look out your window. There's one, right there. It costs $3.50 to produce and is the one of the most common chairs int he world, second only to the tree stump. Ubiquitous to the point of near invisibility. Your aunt has sat in one. So has Obama. Stack them 5 high and you've got yourself a sculpture of the ordinary.
The 3D print and the sticker are a kind of nod to the normal and the accessible. Repeatable, inexpensive to produce in bulk, put them anywhere and they blend in. The image for the sticker was pulled from wikipedia. The file for the chair print was a free download made by user polydisco on Printables.