Having different-sized breasts is perfectly normal. It's quite common for girls to have different-sized breasts or nipples, especially as they develop during puberty. Everyone's different, and no two women's breasts will look exactly the same. In fact, asymmetry — where one body part, like a foot or a hand, is a slightly different size or shape from its partner — is quite common in humans.
When girls begin puberty, usually between the ages of 8 and 13, their breasts begin to develop starting with just a little swelling under the nipple. This is known as breast budding. You may notice that one of your breasts starts developing before the other or that one is growing more quickly. Many times this difference in breast size evens out once a girl is older, usually by age 20. But it's also perfectly normal for women's breasts to remain different sizes even when they're fully developed.
Some girls with different-sized breasts worry that there's something medically wrong, but chances are, for a teen, there isn't. If you're really worried about your breast size, talk to your doctor or gynecologist. He or she should be able to reassure you that your breasts are normal.
Girls who notice their breasts are different sizes are aware of their breasts — and that's good news. Being aware of your breasts can help you stay healthy! Learning how your breasts normally look (and feel) can help you notice any changes that might not be normal. Your doctor can teach you how to do a breast self-exam (BSE) that will help you become familiar with your breasts so you can identify any changes.
Some girls worry about their different-sized breasts for cosmetic reasons. Many girls with different-sized breasts or nipples just accept that they are normal and don't do anything differently. But other girls feel self-conscious. It's likely that no one else notices your breasts look different, though. Other people usually can't see the difference in the size of a girl's breasts — even if that difference is a full cup size.
The fact is that exercises, supplements, or diets won't change the size or shape of a girl's breasts — only plastic surgery can do that. (And most doctors recommend that a girl wait until her breasts have finished growing before considering plastic surgery.) Some girls decide to wear especially supportive bras or special inserts that make their breasts appear more equal in size. Talk to a lingerie salesperson if you want some suggestions for evening things out. It may also help to talk to your mom, older sister, or an aunt or grandmother — they may have worried about having different-sized breasts during their teen years, too.
Everyone develops differently, and it's normal for the two sides of our bodies to be a little different from each other. We humans aren't as evenly proportioned as we appear at first glance!
Finding the Right Bra
Why bother with bras?
Bras not only minimize jiggling and shape the appearance of a girl's breasts, they're also helpful from a health standpoint. Wearing the right bra keeps a girl's breasts supported while she's playing a sport and can help prevent injury to breast tissue. A well-fitting bra is also important for a woman's posture, particularly if she has large breasts. A bra that doesn't fit can cause back problems, muscle tension, and even headaches.
Yet 8 out of 10 women wear bras that don't fit.
All About Straps, Snaps, Bands, and Cups
Finding the right bra doesn't have to be an ordeal if you know the basics of bra sizing. There are two parts to a bra's size: the chest size (also called the band size) and the cup size.
The chest, or band, size is the part of the bra that runs across a girl's chest and around her back. The cups are the parts of the bra that hold the breasts. Bras come in many sizes, which are different combinations of the chest sizes (shown as numbers — in the United States, these are 32, 34, 36, etc.) and cup sizes (shown as letters — AA, A, B, C, etc.)
It's important to get both the chest and cup sizes right to ensure a proper fit. Some bra manufacturers are now starting to offer cup options in half sizes in addition to regular cups to help girls get a better fit.
If a girl wears a bra that's the wrong chest size, the bra's band will either feel tight and uncomfortable around her rib cage or it will be too loose and ride up her breasts. Bras that are too small in the cup will compress a girl's boobs and force them to bulge out the sides (think armpit boobs). And cups that are too big can wrinkle and pucker, which won't look good under clothes.
So how do you calculate your chest and cup measurements? It's easy, and it's something you can do in the privacy of your own room at home. All that you need is a tape measure.
Chest measurement. Bra fitting experts offer two methods of calculating the chest measurement. The most common method involves running a tape measure just under your breasts, all the way around your back and rib cage. The tape measure should rest flat on your skin and lie straight across your back — not so tight that it digs in, but not so loose that it sags down in back. Make a note of your measurement and add 5 inches. That's your chest size.
You can also estimate your chest size by running a tape measure across your chest above your breasts, under your armpits, and around your back (measure from the same back position as in the first chest measurement option). This method is easier because you don't have to do any addition or other calculation, but some people feel it's less accurate than using the first method.
If your chest measurement comes out as an odd number (such as 31 inches or 33 inches), it's usually a good rule to round up to the next number. Most bras have a few sets of adjustable hooks and eyes, so you can adjust the tightness. It's a good idea to round up, rather than round down, because when you buy a new bra that hooks on the first or middle hooks — rather than on the last — you can leave room for growth.
Cup measurement. As with the chest measurement, when you're measuring for cup size, make sure the tape is not too loose or too tight. If you already own an unpadded bra that fits well, wear it when measuring for cup size. Be careful about the type of bra you wear to take your measurements, though. Sports bras can flatten breasts and give a cup reading that's too small, and padded or lined bras have the opposite effect.
This time, when you run the tape measure around your body, you're going to take the measurement across the fullest part of your breasts. Write down this number. Now subtract your chest measurement. If the difference between the two numbers is less than 1 inch, your cup size is AA. If it's 1 inch, your cup size is A; 2 inches, you're a B; 3 inches you're a C, and so on.
So you've taken your measurements and you're in the fitting room trying a bra in what's supposed to be your size — but it doesn't seem to fit. Now what?
Before you pile on all your clothes just to go out and look for a different size, experiment by making some adjustments to the bra. Extend or shorten the band around your chest slightly by moving the hooks to a different eye on the hook and eye closure (or adjust the velcro if the bra has a velcro closing). The bottom band of a properly fitting bra should ride across the middle of your back and pass under your shoulder blades to provide the right support.
A bra's straps allow you to modify how the cups fit and support your breasts. When the straps are the right length, a bra lifts the breasts comfortably and the back of the bra will run straight across your back (if a bra is pulling upward in the back, it may be a sign that the straps are too tight). You should be able to get one finger under the straps to prevent them from digging into your shoulders. In general, girls who are petite will need to wear their bra straps shorter than girls who are tall.
Bra Booby Traps
In addition to fit, there are some other things you might want to take into account when choosing a bra.
Breast growth. A girl's breasts can grow and change rapidly during the teen years, which means that until you stop developing, you might have to change your bra size several times. If your breasts are still growing, consider buying fewer bras and measure yourself frequently to double-check your size.
Because growth can make a girl's breasts sensitive, you might find certain styles or fabrics work better for you. For example, some girls like seamless cups because they don't irritate the nipples; others choose styles that minimize jiggle to ease the occasional aches of breast development.
Menstrual changes. Some girls' breasts change size or shape at different times in their menstrual cycles. Many girls find they like to wear different styles of bras at different times in their cycle.
Different-sized breasts. Most girls' breasts grow at different rates — and many girls find themselves with one boob that's bigger than its partner. This is so common that bra manufacturers design their products so they can be adjusted to accommodate asymmetrical breasts. Start by moving the strap adjusters on a bra to different lengths to see if this helps.
Some girls also use the trick of buying a bra that has removable padding and then taking the extra padding out of the cup for the larger breast. Push-up bras can work well for this because they often come with an easily removable padded section (called a "cookie") that sits under the breast.
Hooks, wires, and other hazards. Take a look at the bra you're about to buy and imagine how it might survive a full day of wear. If the front closure pops open too easily, could this bra let you down in front of your entire drama class? The bra's straps may feel fine in the fitting room, but if the adjusters are sitting right on your shoulder or collarbone, how will that feel under your backpack?
Test to see if the bra band is too loose by lifting your arms in the air and putting them back down by your sides a couple of times. If the bra rides up across your breasts, the band is too loose. If you're looking for a sports bra, jump up and down in the fitting room a couple of times to evaluate the bra's bounce control.
You may also want to try on a T-shirt or sweater over a bra you're thinking of buying to get the finished effect. That pink rose on the front may look cute on the bra itself, but does it make you look as if you've sprouted a third breast once your T-shirt's on?
No matter what the size or shape of a girl's breasts, the most important thing to remember in choosing a bra is comfort. Try on a variety of bras to find the one that's right for you. Some girls prefer the comfort of cotton, others like the support of synthetics or underwires. There are minimizer bras for girls who'd like their breasts to look smaller, or padded bras for girls who'd like a little extra shape. No one bra is better than another — it all depends on which style works best for you.
