Vintage 1980s Blair Co. plaid muu muu with belt tie. Tank top style with square neck line. Vintage 1980s Blair Co. 50% polyester and 50% polyester.  Never worn, in original packaging. 
Size: Tag reads size 12.
Flat lay measurements: 
-Pit to Pit: 19 inches 
-Vertically down front center: 36.5 inches