What’s the average bra dimension in the US?

That’s a tricky question to answer, since it counts on a few factors such together age and also whether we’re talk natural, pre-surgery sizes just (over 400,000 females in the US had actually a breast augmentation in 2018 alone). Oh, and also not to point out that the average breast dimension in America is 34DD, however is no necessarily the same in other countries.

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This article aims to explain exactly what determines your chest size, failure the mean cup size and overall most typical breast size approximately the world, and introduce you to the assorted bra layouts that deserve to make your bust look bigger or smaller. 

Average breast dimension by age (teens come adulthood)

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The teenage years room a delicate, confound time because that both boys and also girls. Girls, however, are forced to face a number of body-image concerns as they prosper and change throughout your adolescent years. Countless young women get captured up v obsessing over your looks, their weight, and their size.


Back before everyone had actually an iphone phone in your pocket, us blamed the magazines and also the runways. In 2019, that all around social media. Instagram stars and influencers are abound looking ever so exquisite, however effortless v their taut skin and hourglass curves the boast rock-hard abs, tiny waists, and also perky breasts and bottoms.

It’s no wonder teenage girls want to emulate your so-called flawlessness if being as well young come realize precisely how unattainable this type of ‘perfection’ in reality is. What’s worse? Teenage bodies are hardly perfect developing. Just how a girl looks at 12, and also then in ~ 15, and also then at 17 can often look choose three totally different women.

Although a woman’s breasts room usually fully-formed by the moment she finishes puberty (which usually implies to a 14 year old, 15, 16 or 17 year old), that’s no to say that her bra size then is the one she’ll wear because that the remainder of she life. Breasts readjust size and also shape transparent life – and also even top top a monthly basis, together they can swell slightly during menstruation.

It’s especially complicated to calculate the average bra size amongst teenagers, due to the fact that puberty have the right to hit at wildly different times. At age 7, 15% of girl are currently developing chest tissue. By age 8, that number rises to 25%. And also yet there are others who make it come 12 or 13 through no signs of breast expansion at all. It’s perfectly feasible for one teen to be wearing one ‘adult’ bra while many of her peers are still in a training bra, or no needing to wear a bra at all. 

Going later into life, the typical breast size among women in their 20s, 30s and also 40s will certainly be smaller sized than for women in your 50s and also beyond. That’s since of the menopause, which has tendency to start between periods 45 and 55. It causes a slow of the metabolism, i beg your pardon in turn can lead to weight gain. According to a 2004 study, roughly 1 in 5 women will certainly wear a larger bra dimension post-menopause 보다 they did beforehand.

No one appears to have actually studied bra size by period in depth. Yet it appears safe to surmise the the average size will gradually increase with age – with perhaps a spike in the twenties and also early thirties, since this being when plenty of women become pregnant and see your cup size temporarily skyrocket.

Average cup dimension in America and other countries:

Just as the average clothes size varies roughly the world, so too perform boob sizes – fairly a lot! substantial study of end 340,000 females measured the average cup size of people born in 108 countries, and also found the it varied from listed below an A to over an F (US DDD). Here are several of them:

Average cup size in Australia:D
Average cup size in Brazil:B
Average cup dimension in Canada:DD
Average cup size in France:A
Average cup size in Germany:D
Average cup size in Ireland:D
Average cup size in Italy:A
Average cup dimension in Japan:A
Average cup dimension in Mexico:B
Average cup size in new Zealand:D
Average cup dimension in Russia:B
Average cup size in Singapore: DDD
Average cup size in USA (non-Caucasian):DD

Women in southern Asia and South-East Asia tend to have actually the smallest cup sizes. Back some nations were excluded from this study, including China, throughout Japan, Singapore, Taiwan, Thailand, Malaysia, Indonesia and Cambodia the average cup dimension was always an A or below. Unsurprisingly, this general an ar is known for its ultra-padded, ultra push-up bra styles!

The largest (popular) average cup size was uncovered in the USA, specifically among Caucasian women. This to be the only group in the study where the median size was over a DD.

However, it is important to keep in mind that not all boob sizes, like ‘D cups’ are the same size. A 36D is bigger than a 34D in the band and cup, and has the same amount of breast tissue together a 38C. We’ve described why in information in the ‘sister sizing’ ar of our bra size chart page.

Therefore, it’s much better to look in ~ the mean boob size in terms of volume, and also not just the average cup size. Luckily, the very same study also involved measuring chest volume in milliliters.

Average Breast size By nation (mL)

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Boob size Chart

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You’ll notice for example that the average breast volume in Ireland is significantly higher than in Germany, regardless of both countries having an mean cup size of D. Although the examine did not include band size data, this argues that in Ireland, the average band dimension is larger – a 36D for example rather 보다 a 34D. As simply mentioned, ‘D cups’ room bigger once they’re ~ above a bigger band size.

Note the both boob dimension charts above are based on measurements take away from ladies aged 28-30 only (who to be neither pregnant no one lactating, and who had not gone through breast surgical procedure of any type of kind). So although lock are very useful for comparing cup and also breast sizes between countries, they nothing necessarily represent the mean size in each nation overall.

So what is the all at once average? fine according come one research of 60,000 people, the median bra size in America is a 34DD. That’s up from a 34B two years ago.

However, at least part of that increase have the right to be meeting to better education ~ above bra sizing, and also the fact that the far simpler nowadays to uncover a bra in a D+ cup size. Under full-busted females today space wearing a too-small cup size by mistake, or trying come cram your breasts into one simply because nothing larger is available. And given that the mean band size hasn’t changed, it seems American women haven’t really gained much bigger.

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What identify your breast size?

Why do some females wear a AA cup, and others wear a GG? all at once weight is a aspect of course – however then of course, there are both thin women through naturally large breasts and plus-sized ladies with tiny ones.

As defined further above, age plays a role in determining her bra size. A mrs in her fifties or sixties is an ext likely to it is in full-busted than a 17 year old fresh the end of puberty.

Pregnancy is also a factor. Not just lactation itself, which have the right to easily reason an (albeit temporary) boost of 2 to 3 cup sizes, or also more. But also whether you’ve been pregnant in the previous – some women’s breasts stay larger after they’ve finished breastfeeding, but many discover that theirs shrink down to smaller than their pre-pregnancy size.

Mostly though, it simply depends on your genetics. Despite insurance claims to the contrary, there are no pills you deserve to take, cream you deserve to use, or practice you deserve to do to rise your breast dimension (although structure up her pectorals muscles that sit below the breasts can make lock look a tad bigger). If your mommy had specifically small or large chest, or experienced a particular change in cup dimension after having you, yes sir a an excellent chance you’ll follow suit.

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Bra layouts to make your breasts look bigger or smaller

Not happy through your natural bust size? If you’re in search of a less invasive solution than surgery, you may be surprised at just exactly how much of a difference an altering bra styles can make. 

Bras come make your boobs look at bigger

Molded cups – back these don’t actually include much volume, they provide you a rounded shape that we have tendency to associate through the ‘fullness’ of larger breasts.

Padded bras – typically made through foam or gel, these have actually padding hidden away inside the cup to give the impression the extra volume. Depending upon how lot padding over there is, you have the right to look all over from 1 come 3 cup sizes bigger.

Push up bras – a specific type of padded bra, these have actually the most padding in ~ the base of the cup. Your breast tissue sits on optimal of it, lifting it greater for an ext obvious cleavage.

Bras to make your boobs look smaller

Minimizer bras – specifically designed for just this purpose, these usage tall, non-stretch cup that store your breast tissue compressed, for a flatter profile. They have tendency to make her bust appear about one cup size smaller.

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Bralettes – a wire-free, frequently unpadded format of bra, this offer much less lift and a an ext natural shape. Back they nothing ‘squish’ her breasts in ~ all prefer a minimizer, numerous women think their bust looks smaller sized in a bralette.

Bandeaus – basically a tube of fabric, this straightforward bra layout doesn’t have actually separate cup or underwires. The lack of support and lightweight compression integrate to give your bust a slightly flatter appearance.