The real main purpose of steel boning in corsets is to support the seams. It holds the seams in place and prevents the corset from riding towards the waist, similarly to how some skirts ride up. The bone just holds it in place. The reason bones do what they do is because they are put inside a shaped seam that pushes them into a certain shape. The flat spring steel I use is very flexible but still offers great support. The forces on the bones in a corset are mostly compressive forces, the seams try to scrunch up and try to squeeze the bone shorter but because the bone is flat steel, it won’t get any shorter.Comes in 6 pieces of 10 inches long.