JCREW classic sleeveless black dress w/pleats sz 4

sleeveless classic black dress size 4 pleats beginning at waist line work or party dress zips up in back as pictured measurements pit to pit 16-16.5 inches waist 13.5 inches shoulder to hem length 37 inches tag cut out so material isn't listed -- but it feels soft and comfortable -- i'm guessing some sort of cotton blend