I bought this for work and I got an xs for a little more fitted look I am 5'6, 136, 26 in waist. It looks very professional especially since my work embroidered it for me. The down side is that I get cold very easily so even though it is light weight and wont make me overheated inside of a hospital where it is very cold this wont keep you too warm. But non the less I still think this is a really nice product and it is very comfortable and breathable.
Rating: [4 of 5 Stars!]