I thought the S/S shirts were roomier then F/W with Gitman and a lot of other brands. Then recently I got an OC x Gitman that seemed to fit a size smaller even though it was a summer item. Wish the sizing was consistent year round and for collaborations. I wonder why they do this. So many people here have complained in this thread about the sizing fluctuations, we should all write to Gitman and maybe they'll make note if there is enough outcry.