From what I am told, by many doctors, if you have naturally small breasts, no birth control pill will make them larger. If you have medium/large breasts, then there is a good chance for them to get larger.
high estrogen levels can produce other not-so-nice side effects, I wouldn't recommend taking high doses just to see if your breasts get bigger. I was on Ortho TC and they didn't get bigger, same with depo shot, but I went on the Ortho Evra patch and they grew to a full B (was an oversized A). Now I've gone off the patch to Alesse and they have shrunk back to what they were.