I ordered the Rab Merino from mass drop I got the Large. I'm not quite an XL but not quite a L either.

The main reason going for the XL is due to being a slim fit.
I have a bit of a belly and pretty broad in the chest area

The Capilene 2 shirts only bother me in that one spot but on both shirts, I have sissy skin, even a grain of sand or a wrinkle in my sock drives me nuts.