A genuine Royal Navy issue Duffle coat labelled as a 'Size 1 - Remploy Ltd'.
Dad bought this but it is too big! He is about 5'6 and a stocky build - 44" chest. I would think this equates to an XXL or more.
The measurements are approx 1m from neck to bottom of coat, armpit to cuff 53cm and armpit to armpit 61cm across.