Military Cyber Rave Wool Coat

this coat looks lovely and is really warm to wear, however the sizing is really really wrong, i'm a size 16(uk) with a size 18-20 chest and quite broad shoulders for a woman, knowing this i ordered a size 20 first which fit more like a 14-16 very tight over my shoulders and having a three inch gap at the front that i couldn't close the buttons over, so i asked for a return and swap for a size 24, the return was easy and i had a new coat within ten days, i cannot fault this companies service, however when i tried on the size 24 jacket i still found it tight across the shoulders and around the arm holes, it fits snugly across my chest and once the laces are done up on the back the waist area fits pretty well too but the shoulders are going to be an issue whenever i wear it, my suggestion to the manufacturer would be to actually get some modern sizes measurements and start using them because the measurements you are using seem to be about 75 years out of date, women have broader backs and shoulders now than they did in the 50's and when you size up make the back broader as well as the front, this is a lovely jacket and i will be wearing it a lot i hope my suggestions are considered as id love for more people who are not undersized to be able to wear it too a beautiful coat.