Floral Knee Length Dress Size 20/22

Floral print knee length dress with crochet lace detail at the neck. A-line skirt gathered at the waist, and 3/4 sleeves. Partial zipper at the side seam under the arm. Deep V neck and not quite opaque, so it would probably require a slip (or it could be used as a swim coverup!). It's labeled as size XL but I'm pretty sure that's brand-specific sizing. It seems to correspond to size 20 or 22 in other popular brands. Waist measures 20 inches flat, with ties at the sides. Sleeves are 18.5 inches long from the shoulder hem and at the center back the dress is 38.5 inches long. No tags, but it's only been tried on and never worn.