Like other cotton shirts I've bought from Merrell, this one is a bit loose fitting. I'm usually either an XS or S but I've learned that since the style of the cotton shirts flare out at the bottom, it makes it bigger so I got the XS and it's still a little big (not skin tight at all). I wore it all day yesterday and found it to be VERY soft and comfortable and I like the contrast of the dark grey with light pink. It was hard for me to choose which color I wanted so I went with the Peppercorn. The arms are the perfect length, the neckline is flattering, and it looks great with jeans. I'm thinking about using it as pajamas too. If you're on the fence about size, go for the smaller one definitely.