What will my bra size be when I am fully developed?

Have you ever wondered how big your breasts will get? Are you anxiously waiting for your boobs to grow, so you can feel more confident? This test is for you!
It might not be 100% accurate - your breast size relies on your genetics and diet, and everyone is different. But it should give you a general idea, so you can prepare accordingly!
Let's get started!

  • 1
    How old are you?
    How old are you?
  • 2
    What is the average cup size of the women on your mother's side of the family?
  • 3
    What is the average cup size of the women on your father's side of the family?
    What is the average cup size of the women on your father's side of the family?

  • 4
    Do you have your mother's or father's body type, so far?
  • 5
    What is your body type?
    What is your body type?
  • 6
    Have you started puberty (i.e, gotten pubic hair, had mood swings, noticed hip growth, gotten your first period, etc.)?

  • 7
    When did you get your period?
    When did you get your period?
  • 8
    What is your cup size currently?
  • 9
    Do you have a weakened immune system?
    Do you have a weakened immune system?
  • 10
    Have you recently gained any weight?

Comments (109)


4 days ago
Got D cup! Mum is a 34DD and am so happy big breats rule!!!! Hope they get bigger soon!
16 days ago
I'll be a d cup? broo what? I thought Id be b? this victoria secret sizing?
21 days ago
Apparently my 👮 are gonna shrink I'm 16 with I cups but Apparently I'll be a D cup lol
31 days ago
It's says D. Everyone on my moms side has D+ and my mom is a DDD. Idk. Idk what I think of that.
45 days ago
i had to guees at my dads side because my grandma and my one aunt both had breast cancer. my other aunt had hers removed because for some reason all the girls in my grandmas family have had it. makes a girl worry. especially if i get those d cups. ( i do realise i sound like a weirdo )
46 days ago
I had to guess my mom's cup size, because like, I don't go around being like "Hey mom, how big is your bra?"....Anyway, I got c cup which I guess is ok I'd rather have smaller though, I'm really self conscious...
62 days ago
I got a b cup
I thought I t would be bigger but I'm happy! 😁😍😑🚺🚼
68 days ago
I'm a C cup. Thats ok. Though right now I'm 13 and I don't have my period and I am a 30AA (measured with a calculator) but I don't need to wear a bra. How am I gonna be a C cup? I think my mum's like a 34B?

@Hannah, I agree. The puberty and period question was very confusing
70 days ago
C cup. Pretty good :D
70 days ago
D. sounds reasonable.
75 days ago
I am 8 years old. lol
75 days ago
I am B cup. my moms D cup
75 days ago
does anyone know if this test is actually accurate. cuz i dont wanna go around thinking im gonna have d cups when i might end up with like aaaaaa cups 😭
78 days ago
Hi i am 10 years old, in a little more than five months ill be 11. I am around 4’10-5’0, 98 pounds and i am a 34 C, my mom was the same and is now a DD+ , i do have more of my dads body type because when my mom was younger she was very skinny and i am a bit on the chbbier side however i dont bave my period
78 days ago
Help I’m 12 and I have a B34 cup, and it said I will have a D+ cup and I’m gaining weight like nah bro I don’t want to help, Istg
85 days ago
I’m turning 13 in a few day but I don’t know what my size i am because the bras I own don’t really fit me anymore and I’m getting new bras before school starts(The bras I own are a 32B). I used a calculator and it says that I’m either a 28C or 28D. My mom is a AAA and I’ve had my period since I was 10. The quiz says I’m going to be a D cup but I’m not really sure if that will be true lol

Every woman on my mom’s side(that I know) are C or bigger and I don’t know anyone from my dad’s side other than his sister who is also bigger than a C.
86 days ago
I’m 13 and 34A. It said I’ll be a C cup. But my mom is 36A. Tbh im not sure 34A is the right size, the straps dig into my skin. But mom’s 36 is too big lol. I already got my period last year, so i dont think I’ll become a C overnight lol.
92 days ago
Im trying to get the test to say sm bigger than D for some reason LOLL its not working though...
92 days ago
The puberty, and period question is confusing. bc on the puberty question it asked if you have started puberty, and I said I have for a few years, (I started puberty at 8, and Im going to be 12 in august) but I dont have my period yet, and it said "like I said, I haven't started yet" but you start puberty before you get your period 🤣
96 days ago
I got C cup and I'm quite proud! My mom has a A cup but I'm skinny so I guess...