Simple polkadot classic dress

Dress looks like a two piece but it is all attached and sewn together, lovely dress with no tags but I can confirm that the dress is a small/medium, fits a small but can stretch to fit medium. Side zipper works, here is some loose string in the photo by zipper on the inside of the dress. Measurements when flat( chest 16in, waist 11in(but has elastic so that can change) length from neckline to hem 28in) also plunges on the back a bit