Geometric pastel sheath dress

Bought from another posher to wear to work but it doesn't fit me right. It's a size small from the forever 21 contemporary line so it runs a tad big. Fits more between small and medium. I'm petite so it doesn't work for me. It's in great condition and looks brand new. Length is 35 inches shoulder to hem. Bust is 32-34 inches around Waist is 28 inches around