Erik Green wrote a review of prAna Hartman Shirt - Short-Sleeve - Men's on May 2, 2014
Familiarity: I returned this product before using it
Fit: Runs large
I bought the XL and it was too big. I subsequently tried on the large at a local retailer, and it felt a little tight through the shoulders when I stretched. I'm pretty sure it will shrink a bit after washing too. To be fair, I have kind of a strange body type - tall, not wide side to side, but a little wider than average front to back. I have this problem with many brands where the XL is way to big, but the large is a little tight.