As a first time buyer at Urban cycling.com I eagerly awaited the arrival of my my new bright pink jersey but was deeply disappointed. According to the size chart it seemed that size medium would fit perfectly. My measurements fell exactly middle of size medium. I am 5 feet 6 in and weigh 125 lb. I could barely zip it and it pinched uncomfortably tight. I took the jersey off and measured the bottom measurement found it to be 33 in, it seemed to stretch safely to 36 in. Anymore could stretch the zipper to breaking point. Also, the arms were too tight on my narrow arms. This is no size medium. I wouldn't risk sizing up with this ill-fitting jersey.