This is a very nice rain shell, exactly what I wanted. However, it runs very small. I wear a 6-8 and ordered a medium, thinking that even if it runs somewhat small (as others have said), that it should be fine. Well, it barely fit around my hips and is quite fitted. I returned it and ordered a large, which is fine, but could actually be a bit larger. I did notice that the darts in the back would be easy to let out (carefully) if needed. A shell (which has no lining) is commonly worn over other garments. It should be roomy enough to do that.
Rating: [4 of 5 Stars!]