Vintage 70s Lavender Formal Gown Blouson Accordion Pleat Dress Prom Halloween Ca

Vintage 70s lavender formal dress, maybe from prom or bridesmaid, but it would also be perfect as part of a Halloween costume for a Stephen King Carrie theme. Blouson top with split flutter sleeve and little bows on each side with a small bow at the waist before falling to a long A-line accordion pleat skirt. The fabric feels like a lightweight nylon or polyester. Back zip closure. No tags but it’s featured on my size medium dress form where it fits well but I think it would fit a larger size small or a smaller size medium best. Please double check measurements to ensure the proper fit for you. Laying flat measures 18 inches armpit to armpit, 13 inches across the waist and 18 inches across the hip and 57 inches shoulder to hem