Globally, a natural female breast has an average size somewhere between a large "A" and a smaller "B" in the US size system. According to European or Australian classifications, this would be a "B".
What's The Average Breast Size In The U.S.? While it's really difficult to precisely determine the standard breast size in the U.S. (or anywhere in the world, for that matter), we do know that the average breast size in America is a 34DD.
Australia - B (26.8) Bosnia and Herzegovina - B (25.3) Switzerland - B (23.8)
Understanding “Ideal” Breast Size
Likewise, 49% of men and 52% of women concurred that a C cup is the ideal breast size, which is close to the average breast size of women in both the United States and Europe.
When our participants were asked what their ideal breast size would be, the C cup was considered the most popular, with 39% choosing it above other sizes.
According to a study conducted by the researchers at the University of Vienna, smaller breasts are likely to be more sensitive than their bigger counterparts. They are also more likely to get easily aroused for increased pleasure.
Gigantomastia or breast hypertrophy is a rare condition that involves developing extremely large breasts due to excessive breast tissue growth. It affects people assigned female at birth. If you have gigantomastia, you'll experience rapid and disproportionate breast growth.
When you look down at your bra do you notice space between your breasts and the cup? If so, it's too big. If you aren't able to see any gaps while standing up, try leaning over while looking into a mirror. If there is extra space in your cups it's time for a new size.
Australian bra sizes typically range for band sizes from 8 (25-27 inches) to 26 (43-45 inches).
For less than one inch you are a AA cup, for one inch you are an A cup, for two inches you are a B cup, for three inches you are C cup, for four inches you are a D cup and for five inches you are a DD cup.
The skin on your breasts should naturally be more or less flat and smooth. Again, consistency is key. Bumps and birthmarks that are always present are not a problem. A sudden change in the skin on your breasts should be reported to a doctor.
How Weight Affects Breast Size. Weight loss or weight gain won't dramatically affect cup size, says Daniel Maman, MD, a board-certified plastic surgeon in Manhattan who sees several patients for breast surgery every day.
About one in four adult women have some degree of asymmetry of the breasts. In some adolescents the problem is that one breast is overdeveloped, whereas in others the smaller breast is underdeveloped.
It has been previously suggested that female breast morphology arose as a result of sexual selection. This is supported by evidence showing that women with larger breasts tend to have higher estrogen levels; breast size may therefore serve as an indicator of potential fertility.
The women with the largest breasts are from Russia, Sweden, Norway and Finland, who, on average, have a cup size larger than a D. Women from Africa or living in Asian countries are on the opposite end of the spectrum - the majority with A or B cup sized breasts.
Changes to your breasts are a normal part of aging. Changes in firmness or size are very common, especially after menopause. However, some changes can be a symptom of health problems, and it's important to know when you should be concerned.
Your Weight
No matter how big or small your breasts are to begin with, a large proportion of the tissue is made up of fat. So it's no coincidence that your breasts get bigger if you gain weight. Similarly, if you lose weight, your breast size could change too.
A girl's bra won't affect the growth of her breasts. That's because genes and hormones control breast growth, not what a girl wears. Bras don't make breasts grow or stop growing, but wearing the right-size bra may help you feel more comfortable.
As you reach the age of 40 years and approach perimenopause, hormonal changes will cause changes to your breasts. Besides noting changes in your breasts' size, shape, and elasticity, you might also notice more bumps and lumps. Aging comes with an increased risk of breast cancer.
As females get older, their bodies start to produce less of the reproductive hormone estrogen than before. Estrogen stimulates the growth of breast tissue, while low levels of this hormone cause the mammary glands to shrink.
In most of these surveys, majority of participants including men and women have voted in favor of C cup breast size as the perfect boob size. In one of the most comprehensive surveys involving around 1,000 Europeans and 1,000 Americans, more than 53% of men voted for average breast size as the ideal boob size.
Stimulating, caressing or simply holding breasts sends nerve signals to the brain, which trigger the release of the 'cuddle hormone' called oxytocin, a neurochemical secreted by the posterior lobe of the pituitary gland in the brain.
The breasts can enlarge after menopause due to the hormone oestrogen levels going down. When the breasts go through an " involution " process, the milk glands shut down, and the tissue is replaced with fat.