Pardon me for not being clear enough. I was comparing shirt (Work & Western) & jacket (Baker & Bedford) measurements. The EG XS shirt (p2p is about 49-50cm) is already pretty fitting. So, I was wondering if the online fit pics model (about the same build as me) can fit in nicely, then so can I. But, if I look at the measurements, I have doubts. I do not know my true chest measurement. I'm only 5'6ish. May be a XS would work? Btw, I'm leaning toward Baker.