The Patagonia® Men's Fjord Flannel Shirt is a warm long-sleeved shirt that is perfect for layering when the snow begins to fall. Constructed from organic cotton, this men's flannel shirt is soft and comfortable, while also being nice to the environment. This Patagonia® flannel is heavyweight for durability and warmth and offers a relaxed fit cut for layering options. Other features include adjustable wrist cuffs, button-up front closure, and two pockets with button closure. For comfort and style, check out the Patagonia® Men's Fjord Flannel Shirt.
I'm 5'10" and 155 lbs and ordered the Small (also have Small in the Better Sweater) and it fit great. However, I had read some other reviews that said not to dry it and didn't for the first wash but then dried it by accident and it shrunk to where the sleeves are a bit short now. Still fits okay, but wish it hadn't shrunk. I think the Med would've been too big and boxy in the torso.