Hi I am 12 and need a bra. All the girls in my class wear them and I feel odd when I change for sport class. How do I Ask my mum to get me a bra??

The question is not what all your friends wear, but what YOU need. If you feel you are developed enough where a bra is necessary, then you go to mom and show her and tell her you think its time that you got a bra.

First at 12, sometimes I am suspect to the comment "all the girls" Since at 12, there are many girls who have not developed to that point yet and others already look almost grown.
12 is a tough age.

So is it really that you need one, or just want one ( either is OK, but you address it with your mom from the real reason)

If you need one, you go in and tell her you are growing and it is time for one.

I love the way my niece did it, she wore a thin T shirt in her home and told her mom that she did not know why the boys keep looking at her breast, could it be that without a bra her nipples were showing and they were looking at that.
They went to get bra's within the hour,

Thanks so much for the help!