I am 5ft 9 inches tall and weigh 140 pounds I am so tall and skinny. It's not baggy or tight, but I would have preferred it to be a few inches longer because I'm having trouble stowing it. The large size (I have an adult small) could stay tucked in better but would be baggy. I'm guessing it's either for people who don't tuck their shirts in, or for people with a more normal height/width ratio.

I bought this shirt three sizes bigger than I did in winter and may have to go back to my normal size just because it's so comfortable! Good quality cotton, does not stretch, colors do not fade or fade, very comfortable to sleep in! The only gripe I have is that the 3/4 sleeve length doesn't really fit - even the one that's too big comes just below the elbow and should be mid-forearm. Otherwise it's great!