First of all, this is an awesome, heavy, high quality flannel. I wanted so badly for it to fit right! I followed the sizing chart on the site and even went to the more intense sizing selector on The North Face site. On that site it asks for height, weight, how you want it to fit, and age. I guess men carry weight differently when they age. Im pretty slender, 6 feet tall, 170lbs, and Im 44. I guess all of that together means I need a size medium, which is what i always order in other brands. Maybe since im 44 they assume i needed the shirt to also fit like a tent haha. Very boxy, loose fitting. If you are looking for something to layer under, or prefer a more roomy fit this would be a great shirt. I prefer a slimmer cut shirt and as much as i tried to talk myself into being ok with the fit, i just couldnt get there. Have to return. FIt doesnt seem true to size based on my fit preference.