Using the Lengthen shorten Line to Adjust to Your Size Blog Oliver + S Dressing the Larger Bustline PinkOrchidFashion Under bust cut style line* is a design detail where the seam or cut of a garment runs directly beneath the bust area. It's often used in dresses, tops, and gowns to: * Full & small bust adjustment for the Eloise dress FBA & SBA By Hand London How to do a FBA or SBA for a Princess Seam Fable Dress, Pathfinder V Twig + Tale