A lovely and feminine evening party dress. Little black dress number original from the 60s to early 70s. This would have been professionally made for a boutique, it has a size and fabric label but not brand. 
In black polyester fabric, the dress is strapless with elasticated silver metallic band on the top of the bust. The bust is pleated then gathered at the high waist with elasticated silver metallic band. The skirt is floaty with pleats and falls just below the knee. Not lined. 
Marked as 36. To fit 36” bust. Shown on XS to S model. Best fit XS.  see below measurements for best desired fit. 
Length 32.4”
Waist max stretched 17” - not stretched 10”
Pit to pit max stretched 17” - not stretched 10”
A lovely dress!
Good vintage condition with light signs of general wear. Stored for a long time may require airing.