Optical illusions are widely used in fashion. Vertical lines elongate and slim the figure, horizontal lines broaden it, and diagonal lines create curves and dynamic shapes. Do you see the effect Longitude! The Virtues of Vertical Stripes The Directrice How You Can Use Verticals To Look Taller and Slimmer Inside Out Style After posting about the One Hour Dress, I thought I'd follow up with some design techniques you could use to prevent your version from looking like a hideous sack like my first