“He is 6'3", 175 lbs., with 6'9" wingspan. We bought M-XT, anf it fits perfectly. He has never owned a sweater/sweatshirt with arms long enough to go past 3/4. Even Old Navy/Gap tall sizes wouldn't fit and would hit about 7/8. This is the first time ever we've found something that not only fits the body around but also the sleeves. THANK YOU for making these sizes for slim, tall males, and making them affordable!”