OCBD shirt fit

I've always worn too large clothes in the past and am now trying to renew my wardrobe and get some clothes which actually fit. I feel that I may have gone too far down in size with this shirt, though. How does it look to you guys? It doesn't pull or stretch anywhere, but it still feels too tight around the chest and waist. Or is it just my habit of wearing oversized clothes which is tricking me?