1950s jacket in an XS size (18.5" pit to pit, marked as French size 40, would be a 36/38 today). Classic cut, faded dark blue cotton twill, small round collar. Made by more obscure brand Reb (with a fab label, and the slogan 'giving you more freedom of movement'). 
3 patch pockets, 5 front buttons, one inner chest pocket.
100% cotton, soft fabric.