My problem is the same thing! I am 5'6 and addicted to the gym.  My chest is around 46 inches and biceps around 18 inches with a waist of 30.  If I buy extra large clothes because they are made for fat people they take this maternity looking shape and just appear gross. I have to find the expensive fitted designer clothes in order to A) not look like I'm wearing a dress B) Not look like a maternity shirt (my scrubs look like shit) and C) Rip when i have to pick up stuff.  Fat privilege is cheap brands cater to you where expensive brands cater to aesthetic bodies to look good.