Swrve Milwaukee Hoodie

I have a S Milwaukeee. It's great, but it's the biggest jacket I own by a mile. I have several Small and Mediums from other brands that could all be worn underneath it quite easily.

Strangely enough, I aslo have a few Swrve Hiding Hoodies in S and they are all too small!

It's all quality stuff though, and I'll be buying more...

Has anyone bought this hoodie? If you have, do you think it's cut generously or more on the trim side? I've been thinking of getting one but I need to know whether I should get the S or XS based on whether I can put stuff under it or not. It's a men's jacket and can't decide whether S will be too big.