So I have a 12 year old daughter (almost 13) who has needed a bra for the last year but hates being measured for one (she won’t let a shop assistant do that, she’s very embarrassed about the whole idea of her body growing!).
I’ve got her various sizes- crop tops/sports bra/thin strapping ones but most the time she isn’t wearing one so she wears tops and baggy jumpers to hide her chest.
I’ve looked online and I’m getting confused with sizing- can someone tell me a simple method of knowing her bra size if I measure her. Different methods online have put her at 28DD and 30A 
Plus if anyone else has had a teen like this, please tell me they eventually get used to wearing one! - I loved my first bra! 