One question I get asked occasionally is whether a sewist needs to have a dress form. The short answer, believe it or not, is “no.” ... Whether you need or can use a dress form depends a lot on what you want to do with it. Many dress forms or female headless mannequin are made solely for display in stores for merchandising the clothing. What are mannequins used for? Mannequin (also called a manikin, dummy, lay figure, or dress form) refers to an often articulated doll used by artists, tailors, dressmakers, window-dressers and others especially to display or fit clothing.What is a mannequin without a head called? Headless Mannequins. Headless mannequins are perfect for stores that have a limited height of the ceiling. They are crafted from fiberglass and come in different shapes, sizes, poses, colors and finishes but all are beautifully crafted.