Spanx The Perfect Collarless Blazer - Size XL - Navy Blue - New with tags! Single button front, stretch Ponte knit, collarless V-neck, slightly oversized fit. Style 20384R. The materials is substantial, but stretchy and looks so polished. Chest 24.5" across Length 29" down center back. Shoulders 18" seam-to-seam across the back Sleeves 25" from top of shoulder to end of cuff. New with tags