Plant print set with size xxl but fits like a M/L

Two piece set- crop top and wide leg pants Size on tag is xxl but fits more like a medium or large. I don’t know the material as there is no tag with the info It is thin and satiny. It’s comfortable and cute. It is too big for me now if I’d keep it lol. Pant measurements: Waist: 16” lying flat. Has elastic on back half Inseam: about 25-26” Leg width: 16.5” Shirt measurements: Length: 16” Armpit to armpit: 22”