I am 12 years old and i have my first degree black belt. At our school we have a system in which you get your full black belt if your 16 eyars old or over. But, If you are under the age of 16 you can still get your black belt. the only difference is that the belt has a white stripe through the middle. All of the students at our scholl who want to become black belts have to pass our 2 day test. if you can pas that im sure it doesnt matter what age you are.