Salvage Sexy Bronze Age Tunic / Mini Dress Altamount Speedway Lace Back L
This brand runs small so here are your measurements:
Armpit to armpit: 18"
Waist side to side: 16.5"
Shoulder to hem 34"
The fabric is bronzed and silky feeling, 
Rayon acetate.  Hand Wash
This brand is fierce and highly stylized.  Love it!