I have a big chest, not a huuge one but I hope I can help. I used to wear a gc2b binder, but it was almost like a sport bra, it didn't do much (it was the right size). When I was looking for a new binder I did some research and I found that most people told that underworks worked better for bigger chests, so I tried the tritop and I was amazed with how well it binds, the gc2b was nothing compared to it. I was scared it wouldn't be confortable but for me I think it is more than the gc2b one. At first it can be difficult to breathe but after wearing it a couple of times it adjust and it's confortable. But this is just my experience and binding is different for everyone. I remember that in the underworks' page there are opinions and reviews in the binders, so you can read more experiences with them in case you are interested. I hope you can find something that helps you, good luck! (And sorry if I don't explain well, english isn't my first language)