Keep or Sell Moment? Self Portrait Midi Dress

I stumbled across this gem recently from one of SP's first collections. It's labeled a size large, but I tried it on and it fit - and I think I'm in love. It's pure strectch (60% Viscose/38% Polyamide/2% Elastane) and hugs the body perfectly. Illusion mesh strips add a chic and sexy look. Gold zip down the center. As said, labeled large but please see approx. measurements below: Bust: 13” - 18” Waist: 10.5”-16.5” Hips: 13”-19” Length: 49”