"I'm normally an XS, but looking at the measurements listed for this top I figured it might run a little small, so I ordered a S. Big mistake. It was huge on me, it fit more like a M than a S. The thing about the fitting is; the shirt is meant to fit loosely, but it looks better when it's somewhat tighter. If it's too loose (like the S was on me), it looks kind of sloppy. I would definitely recommend ordering a size down, though your normal size should give you the baggy fit shown on the model. This is definitely a great summer shirt, very cool and light."