St John coat collection light jacket coat

St John coat collection by Marie Gray Black Cotton and polyurethane blend outer. polyester lining. Very silky. Professional dry clean only. Covers bum Button closure with belted waist Size XS- I have loong arms and it fits me. I normally wear S-M. Lay flat measurements Armpit to cuff 18” Shoulder to bottom hem 31” Armpit to armpit 18” (button done up) Any other measurements please don’t hesitate to ask :)