My back and shoulders say thanks
I'm 5'5  and about 38-39in 160 Lbs and got the large size. But it does expend a little beyond  that. I have a desk job for 8 hours and my shoulders and upper back have been killing me. The moment I put it on, did the adjustments  real quick.  You just feel the relief right away. So far I love it. Will update after testing at work!
Rating: 5 stars