Vintage 70s pink maxi dress with ruffles sleeves

Vintage 70s baby pink maxi dress with ruffles. Polyester Metal zipper on the back No size tag but union tags Excellent vintage condition, discoloration on the inside only (see last picture). Outside of the dress no stains. All measurements are approximate and done on the garment laying flat Waist 13.5 in Armpit to armpit 16.5 in Length 54 in