Vintage 1980's? Vassarette Women’s Navy Blue Full Long Slip Dress Nylon with Lace detail at chest and hem.  The size is labeled as 34 F.  Condition is used but there are no rips, tears, holes or stains and I found no snags.  Enlarge and look at all photos for more details on condition, design and size.  Please contact if additional information or photos are needed.