Woman's Unbranded One Piece Swimsuit SZ XL

Woman's Unbranded One Piece Swimsuit SZ XL NWOT - Still has hygenic Liner Note: Size tag says 3XL. I can't see how it would fit 3XL even with stretch. I estimate to be more like an XL. Please refer to measurements. Appx. flat lay measurements: Shoulder to crotch: 31" Armpit to armpit: 18" Waist: 16"