I have a few of these Red Plume shirts and the sizing is very small. I'm wearing a men's large for this style and I'm a 5'5" woman weighing 135lbs. So, they run small.

I've had issues with quality control. The other two shirts I bought are fine, but this one already has a hole in it after wearing once and washing twice. C'mon! I know they're cheap but that's pretty bad. All I did was go to the gym. So I may not be buying another one after that.