www.amazon.com/gp/product/B075LMLFP8/ref=ox_sc_saved_title_1?
Amazon product ASIN B075LMLFP8
Picked this up just before the camp out. It's totally a Christmas morning, thick, soft, don't tuck it in, shirt. I wore it as a 3rd layer while we camped. t-shirt, long sleeve henley, and then this. A jacket easily went over it when we rode.
I'm 6', 180#, 32-33 waist, 35" sleeves, and a 42 or occasionally a 42L in a suit coat. I picked up a large. USUALLY I get shorted in the arm department but this fit flawlessly even after 1 wash/regular tumble dry. Like zero shrinkage. It fits a little big around the middle, and the sleeves went about 1/2" past my wrist. It's not a snug, tapered fit at all.