For most brands I have (Rapha, la passione, pedal mafia, etc.) I typically fall into a medium for both bib and jerseys. In the size chart, it says a large is a 36" chest, and my chest is about 39.5", so thought this would more of a "race" fit. Also, The model appeared to have a pretty tight fit being 5'11" and 140 lbs with a size small. I'm 35 lbs heavier, so felt that also indicated two sizes up (to a large) would be more appropriate than a medium.
On me (5'9", 175lbs), the large is clearly a quite relaxed fit throughout, and a medium probably would have been a better size. Regardless, still a very comfortable, high quality, and great looking jersey that I'm exited to wear. I would just recommend sticking to your "usual" size if your measurements don't make sense with the sizing chart.