Is My Breast Size Normal? When Do Breasts Stop Growing?


Is My Breast Size Normal? When Do Breasts Stop Growing?

Breasts come in all different shapes and sizes, and no two peoples’ are the same. Breasts are part of everyone’s bodies. In fact, all mammals have them! A person’s genes determine the size and shape of their natural breasts. Read on to learn more about what breasts are, why people have them, and what they can do!

What are breasts?

Breasts are round groups of fat, muscle, and glands that sit on the chest. Fat and glands contribute to the shape and size of breasts. The areola is the area in the centre of each breast, surrounding the nipple. They are usually slightly darker than the rest of the breast, and they are raised a bit from the skin. Areolas contain glands that produce sweat. Some people may also notice that sweat collects underneath their breasts as well.

Breasts can play a role in the reproductive system for some people. Mammary glands in the breasts are able to produce milk after giving birth to a baby. This milk flows through tubes called milk ducts and comes out the nipple when it is stimulated by a baby’s suckling. The breasts usually stop producing milk about one to two weeks after breastfeeding stops.

How do bra sizes work?

When people talk about breast sizes, they usually mean bra size. This is the size of bra that would comfortably fit someone’s breasts. There are two parts to a bra size: a band size and a cup size. The band size is the size of someone’s rib cage, measured just underneath the breasts, and it is measured by a number like 26, 28, 30, 32, and onward. This number refers to inches. The cup size is how much bigger the breasts are than the rib cage, and it is shown by a letter like A, B, C, D, etc. These are written together in bra sizes like 32D or 28B.

It’s worth knowing that cup size and breast volume aren’t the same. Since the cup size only measures how much bigger the breasts are from the rib cage, two people with D cup bras could have very different breast sizes! For example, someone who wears a bra size 40D would have a different breast size than someone who wears a bra size 32D.

What’s a normal breast size?

Breasts come in all different shapes and sizes and vary from person to person. Since we all have bodies and body parts that come in all shapes, sizes and colours, there are no ‘normal’ breasts. All shapes and sizes are healthy and attractive and can give and get pleasure!

Breast size does not always match areola or nipple size. It’s common to have large breasts and small areolas or the other way around. Many people also have differences in size and shape between their two breasts.

Some people may choose to have their breasts changed through surgery. There are a lot of reasons why a person might do this! A person with large breasts might choose to have their breast size reduced. This could help alleviate back pain and other discomfort. Sometimes, breast reduction can help trans people feel more comfortable in their bodies. Some people may choose to have surgery that makes their breasts larger. As long as someone makes the decision to modify their body of their own free will, it’s okay for them to choose that! Hormone treatments can also affect a person’s breast growth, even after puberty.

When and why do breasts grow?

Breasts usually grow during puberty. How quickly breasts grow can be completely different from person to person. The most common ages are between 10 and 14. For some people, they can keep growing into their 20s and even 30s. There are lots of different factors that affect breast growth!

Since breasts are partly made of fat, weight changes can affect breast size. They might get bigger if someone gains weight or smaller if they lose it. It all depends on how someone’s body works! Everyone goes through times when their body is changing — it’s a normal part of life. It can be hard to go through these changes, but the important thing is to focus on learning to love your body.

Are breasts sexual?

Breasts are a part of some people’s, but not everybody’s, sexuality. For some people, breasts are sexually attractive. As well, some people have sensitive breasts and nipples and like them to be kissed, licked, or touched.  For others, they might not want or enjoy having their breasts touched. Both feelings are okay!

Some people like big breasts, some like smaller breasts, some like them to be in-between. Some people don’t care about breast size, and some people don’t like breasts at all. Whatever your size, chances are that someone will find them attractive.

Check the resources below for more info on breasts, sexuality, and the things that can affect breast growth!

More info

Sexual Health for Trans Women

A pamphlet from the Center for Excellence in Transgender Health explaining sexual health concerns for transgender women, including birth control, STIs, maintaining erections on hormones,…


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