Stunning VTG 70s blue knit maxi/prom dress

Vintage 70s blue polyester knit maxi prom dress with chiffon bodice overlay This is so beautiful on🥰 No brand , size or material tag Armpit to armpit is 18” Waist is 28” Length is 55” I’m a size 4 and this fits me perfectly on top but way too long for me☺️ since I’m 5’3”