Vintage lingerie teddy romper

Vintage lingerie teddy romper lace detail slit on the sides snap crotch color is white / off white no size tag...please see pictures for measurements. I would say it fits better for small or a small medium. Im size medium and its a bit tight. Straps are not adjustable... but everything is at the 'right place' to my opinion In good vintage condition. I did not see any flaws.