If you are over about a C cup, I wouldn't get one, but if you are not so big, these are super nice binders, imo. I have a lot of sensory issues and went rather big. I think that most of the loveboats run on the small size. It makes sense since they are made in Taiwan and Asian guys are small. I think I'd guess 1-2 sizes big. I think this is a popular binder so we might get other opinions.
--Jay