Since this top has a loose style, I went with Medium instead of Large size. Overall fit is nice - sleeve length is perfect.  But neckline is a little too loose for my taste.  I had to add a layer under this in order to wear to work, which looked a little awkward since the neckline here is nicely finished. I think a size Small would be a little too tight overall, and neckline might still be too big for me. It's just how it is designed... Absolutely love the color!