You are 12 and you have not got your period yet were a c cup when will get it?
The average age for girls to begin menstruation globally is between 11 and 14 years old, with some starting as early as 8 and others not starting until 15 or 16. it's important to remember that everyone will go through puberty and experience developmental milestones such as breast development at their own pace.
As you mentioned that you are 12 years old and have not started your period yet but you are already wearing a C cup bra size, it is best to consult with your doctor or healthcare professional. they can assess your overall development, evaluate any underlying medical condition that might affect your menstrual cycle , and provide guidance based on your individual situation.
Remember that every person is unique, and comparison with others may not always provide accurate information about your own development timeline . Trust the experts and the guidance of your healthcare provider to understand what is normal for you and ensure a healthy journey through puberty.