You can obviously tell when a girl wears a bra a few cups bigger. Because the bra will be too big for your boobs and if you stick it out, we can see your nipples. so don’t flaunt it. it just makes your such a try hard and slutty. everybody knows your your boob size, and everybody’s okay with it. just, go with the flow and be happy with it. it doesn’t make much difference if it’s bigger/smaller cause no one (besides really shallow bimbos) really cares.