Just brilliant designer dress by For The Love & Lemons dress. High-low tulle skirt,  with mini lace skirt underneath and built in leotard bottom. Lace corest with linning in the breast area. Tag labeled size XS. 
 
Measurements taken laid flat, in inches:
Shoulder to Shoulder - NA
Bust - 33
Waist - 26.5
Hip - 32
Length - 23 (front)  57 (back)