Navy sparkly prom dress

Sparkly long prom dress by Let’s. Has built in cups and gorgeous cap sleeves. No stains or tears. Was professionally hemmed (measurements below). Only worn once (for prom), has been professionally cleaned, and has been kept and properly covered in my closet since. Measurements: pit to pit is approx 19 inches, from the very top of the back to the bottom of the dress it’s approx 55 inches. Dress says it’s a size XL but I would say it fits like a dress size 8 or 10 as I usually am between those sizes.