Mason one shoulder dress size 2

Details Size & Fit A coral color elegant, modern Mason by Michelle Mason cocktail dress in an alluring one-shoulder silhouette. Asymmetrical panels form angles at the neckline and hem. Lined. No zipper. Pullover. Says size 2 Fits me very fitted and I’m 5’4” 34C 26 36...116 lbs So I’d say it’s an XS!!!