Abstract: A clothing mannequin has a one-piece flexible but stiff sheet formed with a plurality of flaps and with a plurality of small holes, a base plate formed with a central hole, and a plurality of clips engageable through the small holes for securing the flaps and base plate together so that the sheet has the three-dimensional shape of a human trunk with the base plate horizontally secured inside it with its hole centered in the trunk and with the sheet forming a neck hole vertically aligned above the base-plate hole. An upper upright post part projects vertically through the neck hole and the base-plate hole and fits into an upper end of a lower upright support post part to form therewith a support post. A crosspiece projects laterally through the lower post part directly underneath the upper post part and the upper post part rests on the crosspiece. A base adapted to sit stably on the ground is formed with an upwardly open seat in which the post is releasably received.