Your boobs develop in stages. At first you may notice what feel like little “buds,” or swellings, under your nipples. After that your breasts will get bigger and fuller, and may feel more than a little sore at times.
Remember, every girl is different. How large or small your breasts will be depends on the physical, genetic traits in your family. Wondering how big your boobs will get? It takes two to three years to reach their permanent size.
Help! My boobs are uneven!
One breast may grow more than the other at first, but they'll even out later(most women have one breast that is larger than the other, but the difference is usually small).