I ordered this shirt with a bit of trepidation.  My son is 6'3" and wears tall sizes.  I wasn't sure if it would be long enough in the body for him even though the neck and arm measurements were correct.  Well, we received the shirt 2 days after we ordered (love Amazon prime) and he tried it on, and it fit him well.  So thankful it was long enough and I didn't have to return it, but was confident in ordering because I knew I could return it if needed.