6'0. 180 lbs. Size Medium.

I went with the size medium taking a shot on this. I absolutely love it. I only hang dry my shirts, so, if you want it to stay dark and to stay the right size, just air dry it. I'm pretty certain it's all cotton and will hella shrink if dried in a dryer. The strings on the front went down to my naval, so I cut them in half then tied them at my chest and it fits great. My girlfriend even complained that it's my go-to pullover during the week. I honestly wear it probably four to five days a week. It's long and lean, fits my body well but not too tight on my arms (size 15" around bicep). It's great. Super soft, true to size, slim in the waist. It's a thin hoodie that breaths a lot, so you'll want to layer up if you're going out in the cold.

Go for it. This is a picture of me in it after having it for a few months, been through a dozen washes and still nice and dark.