I waffled on this purchase quite a bit trying to decide whether I really needed it or not. I was replacing a slightly dressier-looking black pullover from the Gap that I've worn for years on vacations that actually still has some life in it. Wasn't sure I needed to spend the $, although having another merino wool product I know that they're worth it. Then I was concerned about the sizing and the fit, having read the reviews. Finally just decided to order it and get it over with, to see how I liked it; the free shipping and free returns were the clincher there. I'm 5'8" and 125 lbs, don't like ultra tight clothes, went ahead and ordered the small in this hoodie, and IMHO it fits *perfect*. (I normally wear a 6 or an 8 depending on how it's cut. I'm not a 4 unless we're talking alternate universe vanity sizing.) In black with a scarf it can even look a little more dressed up than I would have thought. Bottom line I'm happy I finally ordered it.