I ordered the Sierra in both an S and XS along with a few others. While it wasn't ultimately my top choice, I really liked this one. I find that some Wooland dresses are more flattering on curvier ladies than myself and I thought Sierra might fall into this category, but the weight of this fabric makes the Sierra drape very nicely. The a-line shape looks very intentional, rather than just baggy. I am sometimes a small and sometimes an XS, and in the Sierra I definitely needed the XS.