GAP polka dot sundress

Navy with white polka dots. Fit and flare style. Zips at side. Measures 16 inches pit to pit and 29 1/2 inches from pit to bottom hem. I am 5'6 and dress hits just above my knees. Had only been worn a couple times. Does have some light markings on trim above bust line from iron that are barely noticeable when wearing. Looks like it is supposed to be that way.