Vintage Houndstooth Peter Pan Collar Blouse

Vintage purple & black Houndstooth blouse by Haberdasher from the 70's/80's. Silky and flowy with a Peter Pan collar. Pretty, shiny, black, diamond cut buttons. Bishop sleeves with a thin half shoulder pad. It's missing the material tag but I'm pretty sure it's polyester. Also missing the size tag so please see measurements as I'm guessing on the size. Approx flat measurements: 18" chest, 14" shoulder, 20.5" shoulder to bottom hem & 24" sleeve.