Vintage 9 blue lace tulle prom dress formal costume gown Elsa Halloween

Vintage size small blue dress. Says size 9 but measures like size small. Could be a great Elsa Disney bounding or Halloween costume SIY. White lace top (with yellowing areas from age) with blue heart shaped body underneath. Tulle skirt with pink slip underneath. Zips up the back and has a hook. Measures 16 chest 37 length