Comfortable jersey. I usually dress size "L", but this jersey is too small in shoulder/armpit area.
So I got size "LX"
I am 185cm = 6'1", 75.5kg = 166 lbs and chest 103cm = 40.25"
I most cases you will have to go one size up.
Looks like this design is for real climbers body shape :-)
Schleck, Contador etc...