BMo3 - I would get the large, and I'm a 34c. I like looser tops, plus I have very long arms. Smartwool seems to be a bit more fitted than Ibex through the torso, but sleeve lengths are similar. As I recall from the pic of the model wearing this shirt in the Title9 catalog, these are more like 3/4 sleeves. Or else the model had the sleeves shoved up her forearms a bit.

I still want this shirt, and they still have L Cayenne. If you buy it and it doesn't fit you, I'll buy it from you. (otherwise I will resist. maybe.)