Original British army jacket BDU combat smock cold weather parka military issue

Hello: The Brit. jacket has very good design features. I made a mistake however by ordering the shortest length; the chest size is fine, but the sleeves are too short. (The overall length is a bit too short too, but that is not as much of an issue as the short sleeves.) The short size was my mistake. I have already ordered another Brit. field jacket from you at Militar which should fit just right; It has not yet arrived but USPS tracking shows that it is in the U.S. and on its way here. Thank you.