Are you saying I'm lying?? Just FYI bodies aren't built the same way. Small fits me in length but hardly fits a 39-40" chest, therefore tailoring is required. Not sure what my arm measures but flexed somewhere around 15-16".
Oh, and also some of this may have been while I weighed 170 lbs, but that hardly makes a lot of difference. Not even sure what my weight is atm, as my weight is out of battery.
I'm 165ish at 5'6" and mediums are on the small size. I have to get everything tailored.