When their breasts need support.
bra
bra
yes
no
Girls don't have to wear bras - many girls do because they feel more comfortable, girls with larger breasts may need the additional support, but no one HAS to wear bras if they don't want to.
Not usually, only if there is a built in bra.
Her boobs will be ugly
No, not wearing a bra is nothing to be ashamed of. Every woman develops at different times, at different speeds, and to different degrees. Some girls develop breasts early and will need to wear a bra at a younger age. Some girls never develop breasts large enough to necessitate wearing a bra. Some women even choose to not wear bras! If you feel self-conscious about not wearing a bra (because of small breasts), you can wear a "training bra" or something with a small padded cup.
Well, hello fellow reader :) I am 10 and I wear a girls first bra So do my class mates Normally girls wear crop tops/sports bra at the age of 9-12 You should really wear a first bra from 10-12 And people recommend a real bra at the age of 11- and onwards It depends. My friend tried a real bra. She said they were uncomfortable My other friends tried a first bra. We think they are quite comfortable :) Some can be uncomfortable. If you need them then wear them Some kids wear them at 8 years of age :)
Some girls like to wear no bra and underwear because they like the freedom of not feeling restricted in tight fitting undergarments.
If you need a bra, you should wear one.