Researchers used computer simulations and experiments to study how metal slabs change shape during a process called Sizing Press. They found that the slabs become asymmetrical, with a fish-tail shape at the ends and a dog bone shape in cross-section. The width of the slab varies periodically, leaving press marks on the sides. This asymmetry causes the slab to warp, leading to increased width after further processing. The findings help understand how the shape of the slab affects subsequent manufacturing steps.