Quilted Faux Leather Shacket

i was looking for a coat to bring on vacation where the weather will range from 50 to 70 degrees with potential rain. The sizing runs very generous. Typically I am a size 12/large however this jacket easily was easily 4-5 inches too wide. While it should be loose and boxy, I think it will look much better if I size down to a medium. If the smaller size fits, it's a keeper.