Lululemon Pima Cotton Open-back Midi Dress Dewy No size dot. Based off reviews of "item runs large" suspect size 12, could be size 10. For reference I'm a lulus size 8 and it was fairly large on me. Would be a loose 10 or a more snug 12 fit Breeze through busy days in this double layered pima cotton dress. An open back and slits on the sides keep the air flowing. Super-Soft, Pima Cotton Fabric(Click to Close) Soft Four-way stretch Naturally breathable Added Lycra® fibre for stretch and shape retention Slim Fit, Midi Length(Click to Close) Skims your body Hits below the knee to just above the ankle Longer in the back Product Features(Click to Close) An open back lets your body breathe Side slits at the hem for added mobility Material and care(Click to Close) Materials Body: 92% Pima cotton, 8% Lycra® elastane Care Wash with like colours Machine wash cold Do not bleach Tumble dry low Do not iron Do not dry clean Imported