It could make them look slight bigger. I am a "T" body type, so I just need a small push. I don't want to abuse corsetting since I am more worried about my training (even after transition, I am medically forced to keep a good level of exercising if I want to avoid back and knee problems), but... It can also help with postural hygiene, and that's a must for me.
I have no love handles anymore (or almost nothing), but I still look round. Poop.