Growing boobs

Isn't the size of your boobs supposed to be hereditary? Because my mom, both my grandmas and my aunt all have big boobs. Like my aunt is an f. And my mom is tiny like me but has c's. However my 23 yo sister only has a little bit bigger boobs than me and...

im 16. Why is it like this? None of my relatives were late bloomers so im very confused.

It's generally hereditary but genes can skip generations, so somewhere down the line, someone else may have had smaller boobs and may have skipped a few generations.

It can also be effected by your weight.

oh and im like a 32 b, and my sister is a 34 b. but even my aunt has made comments wondering why we arent bigger.

ya your weight plays a big part but also your boobs grow up untill you around 20 years old so you got a lot of time! you never know

well I am tiny. 5'4 and weigh 110 but my moms smaller than I am. and I know lots of people with big boobs when theyre tiny

haha I think it is in the genetics because my mum , aunt and granmother are all E cups and when they were my age (15) they were in a A and B cup they got bigger when they hit 16 , it must be true because in the last 10 months I have gone from a 32A to a 34C and im almost 16 and I have the stretchmarks and tenderness to prove that im still growing I can already feel my current bra getting tighter and I have only had it a month

ohh emm gee. help me. my boobs are very small. its a total shame. how can you grow them??