H&M white lace bathing suit cover (see thru) size small

H&M white lace cover with a high neckline and open back (back as strings to tie to keep in place) Only worn once as a dress with a nude slip underneath I believe it is a small but there is no tag. Would have either been small or extra small Has slits on both sides Slight discoloration at the bottom from sitting in the closet for years Please reach out with any questions! ☺️