They do run small, just received a LG long sleeve and had to send it back to Amanda to exchange for an XL.
And I washed mine in COLD water and they still shrunk up to the point they wont work. I had XL to start which with a good quality t-shirt XL fits me. Sorry to say, and Im not bashing...but out of all the bows I have owned and shirts purchased from the manuf. (Mathews,Hoyt, Parker)....The Ross shirts rank dead last for quality! I still have XL Hoyt shirts from 4 years ago that have endured alot of washings and they fit fine! One wash of the cheap Ross stuff and done....to small.
I like my Ross bow better than anything I have owned, but they didnt do their homework when it came to selling a "good" shirt!