Breast implant sizing systems are tester implants Miracle Bust which allow patients to try out various breast implant sizes on their own time, in their own clothing. Until recently breast implant sizers were limited only to the doctors office where you could test them out during your consultation. This, of course, is helpful but basically limits you to trying them on in one piece of clothing and in one situation. Take home breast sizers allow the patient to experience various breast implant sizes at home, on her own time.