Omi+Studio womens dress Size M new spaghetti straps party

100% Polyester. Adjustable spaghetti straps. Lined dress. Slit in the front. Long zipper in the back. Elastic smocking in the back. Lightweight dress. New with tags. Please check the measurement. Visually it looks like the size is smaller than M. Maybe because of the elastic smocking on the back. I can take more photos if needed or make additional measurement.