Quote Originally Posted by McMurdo View Post
I have had similar problems, a rule of thumb is to order one size larger, for example I wear a 40 so for a PC, or Argyll I would order a 42.
For some reason, even though the sizes are supposed to be the same, men's UK sizes usually seem to be about one size smaller than US sizes. Chalk it up to the difference between British tailoring (form fitting) and American tailoring (looser, boxier jackets).