Should my boobs be this big at 15 im a size g and 36

I would have to see first

well I would sayy “daaayyyuuumm” thats big for you being only 15! I mean im 15 and im a 34b hha ill advise you to get boobeh reduction :D

its normal for you every girl developd differently and at different rates and every girl will end up with different sized and shaped boobs so what you have is normal for you but if they are bothering you and are causing back strain and other problems you can get breast reduction surgery but make sure you talk to your mum about it and your doctor, ect and it would be best to wait untill your 18 to get surgery but if its not cosmetic surgery (which its not if its causing you physical pain) it can be done a bit earlier than that

well, im 14 and I wear a 36C. and my boobs are practically spilling out of my bras. I’ve been wearing a bra since 2nd grade. my grandma had 38EE (38 double E) size boobs when I was born. but my mom was only a 32B on her wedding day. she is now a 36DD (36 double D) because of a breast enhancement surgery. I dont take after my moms body in a lot- we are same shirt & pant size and same height. but I have my grandmas butt and boobs so it must run in your genes too.

Yes, for you - everyone develops at different rates and difference in size.