About 5th grade because thats when usually start to develop it kind depends when you start to grow when you are ready go search on google which size should I wear in bras all you need for that is measuring tape or go to target or Tilly's near costco to look and try some on
It could any age. As your breasts start to develop thats basically when you should.
4th grade for early growers and 7th grade for late growers
Whenever you start developing enough to need one. There is no set 'age to start wearing a bra'.... It depends on the person.
I think around 5th or 6th grade I am in 6 and wear a padded bra
For girls it depends on how fast you develop. In grade school, there was one girl in the 4th grade that already started wearing a bra.That would make her about age 9. As a boy, I started wearing bras when I was 8, wearing my older sisters bras and tried on her panties when I was 6. I tried on her other clothes, slips, shoes, and dresses by age 9. To my knowledge, she never caught on!