Clothing Lines to Lengthen & Slim Abby Young Styling: Professional Wardrobe Stylist How You Can Use Verticals To Look Taller and Slimmer Inside Out Style ELEMENTS: Line This hip dress contains both horizontal and vertical line. Horizontal lines tend to broaden and shorten your figure by emphasizing width; they divide height, especially when more than one Striking stripes that flatter! Vertical lines create the illusion of length, add definition to the silhouette and bring structure to every outfit. That's why we love the Aura Stripe Print Shirt Dress: