This is a J. Harlan Originals Vintage 1960s / 1970s Woman's Dress made by the ILGWU Style is Hippie from Polyester material with a Dots Design.  The actual measurements are - Shoulder to shoulder straight across of 16", Armpit to armpit is 20", Waist is 19" Side to Side, Shoulder to Bottom(Hem) is 40"