are you getting it for powerlifting or another purpose?
i have been using a large Inzer blast shirt (chest size is a 44, have a size 54, i can put it on and take it off myself)
I just bought a Titan F6, just got it yesterday & gonna try it out today i think their will be a significant gain, i test fitted it and it fits alot different, i can't move my arms down now.
Ive put up 350 in competition with my blast so we'll see what the new shirt will do in comparison
i do like my blast shirt for just training, as i think i got just the right size not to help me much so i increase my strength when i train, but tight enough so i dont hurt my shoulders.