Boobs slider?

[Stacy0417]

I was curious about something- I have Sims that have boobs that are small and other's (Mostly downloaded ones, I'm not that great in CAS) that are huge. I've tried to make the small ones bigger in the game by messing around with the thing (dont know what its called) when they are just standing in the CAS screen. Is there something in game that I'm not aware of it that makes them bigger other then just adjusting the body slider on the side, or is there a mod I can download to adjust them more? 

[MrSLEEPYGorilla]

 

[Stacy0417]

Thank you..