What Size Is Considered B Cup Breasts?
In the recent years, 34B was considered as the average breast size in US.
In fact, B was the average size since the invention of different cup sizes.
The first bras in cup sizes were only available in large, medium and small, which later transitioned to A-C.
This, therefore, meant that women wearing B cup neither had smaller or bigger breasts.
However, technology and advancement has seen many changes in the lingerie department since the invention of cup sized bras.
So, do B cup breasts fall on the smaller or bigger side?
The size of a B cup bra typically depends on the bra’s band size.
Wearing a B cup bra size technically means that there’s a two-inch difference between the ribcage and the fuller part of your breasts.
It’s only fair to say that the size of B cup breasts is relative in relation to the bra’s band size.
For instance, a woman wearing 32B has smaller breasts than her counterpart with size 38B owing to the difference in width as much as their prominence is of equal distance.
Therefore, the main difference in cup sizes is usually more of the breast shape as opposed to their size.
In other words, the cup size is determined by how prominent the bust is and not the breast tissues in there.
This is to say, the amount of breast tissues in B cup breasts could be similar to those wearing other cup sizes.
The actual B cup breast is that of a woman who wears bra size 34B.
There’s only one bra brand selling this idea, so don’t take it seriously.
In the long run, all cup sizes with a B in it are practically B cup breasts, especially when it comes to bra shopping.
What B Cup Breasts Look Like
As earlier mentioned, B cup breasts are characterized by different sizes and the only way to find out how they typically look like is by checking the band sizes.
In the pictures below, you realize the prominence of the breasts is almost similar in all cases but as we go up the band size the breasts equally increase in size.
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28B Breasts in The Little Bra Company Catherine Lace Bra
30B Breasts in Lepel Fiore Plunge Bra
32B Breasts in Natori Feathers Contour Plunge Bra
34B Breasts in Victoria’s Secret Bip Fit Uplift Demi Bra
44B Breasts in Goddess Kayla Soft Cup Bra
46B Breasts in Torrid Smooth Push Up Plunge Bra
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B Cup Breasts Comparisons and Different Sizes
Just like other cup sizes, a B cup is common just as much.
That’s why it features on different band sizes including 50B, 48B, 46B, 44B, 42B, 40B, 38B, 36B, 34B, 32B, 30B, 28B and 26B.
That’s how the bra measures from the largest to the smallest available in the market.
B Cup Breasts Weight
The weight of B cup breasts varies since those with larger band sizes tend to weigh more than their smaller counterparts.
According to research, the weight of B cup breasts is almost similar to:
Technically, a B cup breast weighs about 560g or more with bigger band sizes.
When it comes to sister sizing, the weight of 30B is similar to that of cup sizes 28C and 30A.
30B breast size weighs 227g
Therefore, 30B breast size won’t strain the muscles while 44B can be compared to strapping the chest with two kilos of sugar.
As you can see, it’s not just women who wear bigger cup sizes that have heavy breasts.
B Cup Implants Size
This question is quite tricky as there is nothing like B Cup implants in the first place.
Breast implants are usually measured in cubic centimeters (cc) and classified in different sizes according to their volume ranging from 80cc to 1200cc.
Larger Breasts Require More Volume to Increase the Cup Size
For instance, the difference in weight between 30B and 32B breast sizes is an addition of 0.1lb only while that of 42B to 44B is 0.3lb.
Bigger band size breasts are a little wider hence require implants that measure up to their width with a higher volume and more weight.
The breast implants width usually varies, ranging from 7.4cm up to 17.2cm.
Therefore, it’s almost impossible to get an implant size to increase your cup size by an exact inch.
Bra Sizes are Different
Bra sizes differ from one brand to the other, making their fit equally different.
For instance, 32B can have a perfect fit in 32C or even 32A depending on the bra’s brand.
Therefore, this means that going for cosmetic surgery doesn’t guarantee achieving an ideal B cup size because different brands have different sizing charts.
However, this doesn’t necessarily mean that you can’t get implants in cup size B.
The surgeon will be in the right position to help and give you an accurate answer depending on the shape and size of your breasts.
This also gives you an idea of how exactly your breasts will look like and weigh after the surgical procedure.
Best B Cup Bras
B cup bras are some of the most popular cup sizes and usually come in a wide range of designs, colors, patterns and brands, save for those that specialize in full figure sizing.
Let’s look at some of the best B Cup Bras in the market:
9. Wacoal Beauty Contour T-shirt Bra
Women with B Cup breasts are quite fortunate since this category carries a wide range of bra options, from strapless, demi, to plunge designs.
Moreover, the bras are easily available since the manufacturing process is easier compared to that of bras of other sizes.
As a result, producing B cup bras in bulk is effortless and convenient.
You’ll find B cup bras in all price ranges.
However, when shopping for B cup bras, always bare in mind that the sizing differs.
For instance, 36B is roomier than cup size 32B.
This is why you need to be conversant with both the cup and band size measurements.
Jeanette is a certified professional bra fitter.
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36C Bra Size Example
Bras might look simple to the eye, but they’re really technical feats of engineering that require a proper fit to work correctly.
The thing about bras, though, is that the sizing is also complicated, because get this: the bra cup size doesn’t translate to the volume of your boobs.
So it’s no surprise that 80 percent of women are using the wrong size bra.
If you ever wondered about bra cup sizes and the biggest bra size letter available, keep on reading.
We’ve covered the details about the smallest to biggest cup sizes, as well as how to get the most accurate cup size for your breasts.
Commercial bra cup sizes generally range from AA—the smallest—to M, N, or O—the largest—depending on where you are in the world and which brands are available.
The most common range is A to DD, though there are specialty retailers where you can get your breasts sized by a professional then guided to a more expansive range of sizes—up to HH.
Go shopping online and you might find plus size bras all the way to O size.
Unfortunately, many women don’t know these sizes are available, because their favorite mainstream department store doesn’t carry such products.
Considering that, for the longest time, you could really only find up to DD/E or F in major retailers, it makes sense that there’s a misconception about bra cup sizing and how bras are supposed to fit.
How to Find Your Bra Size
Now that you know a bit more about the range of cup sizes out there, learning how to size a bra comes next.
You can get your bra size measurements easily.
Grab a tape measure and get the circumference of your rib cage just under the bust then do the same thing but for the fullest part of your breasts.
When getting your band size, round down to the nearest even number if you end up with an odd measurement.
Under Bust (Inches)24-26”26-28”28-30”30-32”32-34”34-36”Band Size303234363840
How to Find Your Bra Cup Size
How to Find Your Bra Cup Size
From there, you can determine the cup size.
Subtract the band size from the bust size.
The difference between the two shows the cup size.
For instance, if you have a 6-inch difference between bust and band, you wear a DDD cup.
A 13-inch difference is an M cup.
Any band size of 34 is considered a “true cup” size, meaning that is what you really are, regardless of what you calculate.
Band Size vs Bust Size (Over Bust)Band SizeUnder BustA CupB CupC CupD CupE CupF Cup2823-24”28-29”29-30”30-31”31-32”3025-26”30-31”31-32”32-33”33-34”3227-28”32-33”33-34”34-35”35-36”36-37”37-38”3429-30”34-35”35-36”36-37”37-38”38-39”39-40”3631-32”36-37”37-38”38-39”39-40”40-41”41-42”3833-34”38-39”39-40”40-41”41-42”42-43”43-44”4035-36”40-41”41-42”42-43”43-44”44-45”45-46”4237-38”42-43”43-44”44-45”45-46”46-47”47-48”4439-40”44-45”45-46”46-47”47-48”48-49”49-50”4841-42”46-47”47-48”48-49”49-50”50-51”51-52”5043-44”48-49”49-50”50-51”51-52”52-53”53-54”5244-45”50-51”51-52”52-53”53-54”54-55”55-56”
Keep in mind that the numbers on the chart can differ depending on the bra design and manufacturer.
In-Depth Look at Bra Cup Sizes – Smallest to Biggest
In North America, bra cup sizes follow a system of A, B, C, D, DD, DDD, G, H, I, K, L, M, N, and O, with O being the largest.
Many people think that AA is the smallest bra size, but there is one that’s smaller: AAA.
The band and bust difference between A cups is slight, about 1 inch.
When the measurement between your band and bust has a two inch difference, the B cup is for you.
Keep in mind that there are no BB or BBB sizes, so if you find that you’re in between the 2 inch difference either way, you may be able to go up to a C cup or down to an A cup.
The bust-band difference for a C cup bra is around 3 inches.
Again, C cups do not have double or triple letter sizes, so if you’re around 2.9 inches or 3.3 inches, you can go bigger or smaller in cup size.
Did you know that the D cup is one of the most common sizes in the US, UK, and Europe?
This means that you have a bust-band difference around 4 inches.
Since D, DD, and DDD breasts can be heavy, women who wear this size often require more supportive bras.
Beyond the standard A-DD sizing that most retailers are committed to, we have the E cup.
This is defined by a 5 inch difference between the under-bust and over-bust measurements.
Some retailers have E cups as the equivalent to DD cups, but that may not carry over to other manufacturers.
Readily available at specialized bra stores, the F and FF cup denotes a 6 inch difference.
Closely related to FF is G, meaning you fall somewhere between 6 and 7 inches.
Sizes tend to be skewed towards designer preference, so be sure to get fitted by a professional.
At this point, you are going to need to go online or to the physical store of a specialized bra retailer.
If you have a bust-band difference between 7 and 8 inches, then you are most likely a G cup.
Be sure to look for bras that provide maximum support, since wearing the wrong sized bra could leave you with chronic back pain.
H, HH, L, M, N, and O are less common than the A-DD range, but that doesn’t mean they don’t exist.
H and HH cups mean you have an 8-9 inch difference, while N and O are for a 14-15 inch difference.
With N and O being considered the largest sizes available in the US, you might have to do some searching to find a bra that fits.
Brands like Elila carry full-figure bras up to size O.
Do You Have The Right Bra Size?
Since we can’t talk about bra sizes without making sure people are wearing the right one for them, let’s briefly discuss what a properly fitting bra feels like.
For a woman with larger breasts, trying on different bra styles and cup sizes is key to finding the one that supports you the best.
This might mean going up or down a bra size—so knowing how far cup sizes go is also important.
Here’s what the right bra fits like:
The underwire is comfortable under the breasts and doesn’t dig into your ribs.The cups cover and support the breasts without any overflow or gaping.The band sits comfortably against your back with any hook, preferably the loosest hook.
You should be able to get a finger underneath the band.The straps don’t dig into your shoulders or fall off.
Does the size of a bralette convert over to a regular bra cup size, you ask?
A bralette is an unlined bra that doesn’t have a clasp or underwire.
Here’s how you can use your bra cup size to determine your bralette size:
Even if you don’t plan on wearing a bralette any time soon, sometimes it helps to see how your cup size compares to t-shirt sizes!
Converting Bra Cup Sizes
You probably have already realized that countries label their bra sizes differently.
If you’re planning on going abroad or need an emergency bra while on the road, knowing the conversions will be useful.
Interestingly, cup sizes vary from not just manufacturer and manufacturer, but also by country.
Larger cup sizes often see the most variation.
The smallest bra cup size is always going to be AA or AAA.
The largest cup is often M in the US and N or O in the UK.
Some countries, like Poland, have bra cups that go all the way to R.
Here is a quick comparison of US, UK, and AUS cup sizes:
Band-Bust Difference (Inches)<112345678910111213US Cup SizeABCDDD/EDDD/FDDDD/GHIJKLMUK/AU Cup SizeABCDDDEFFFGGGHHHJ
And here is the band size equivalent between various countries:
One thing that countries seem to have in common is using the chest circumference and a cup size to display the distance between the bust and the band.
As mentioned previously, the larger your breasts, the greater the variances in cup size.
Sizing does not apply to every single brand around the world.
Many international brands tend to use US/UK sizing, while brands from the EU or JP will use a different system of labeling.
Also, many European brands will skip “I” because it can look like a 1 on the tag.Most fuller sized bras will use UK sizing.
The double letter system that you saw above (DD, GG, HH) works really well with larger cup sizes.
So, if you have a cup size that’s over DD, refer to UK bra sizing for the most reliable fit.Keep in mind that some bra size calculators are inaccurate.
If you’re a fuller figured person shopping for bras in Japan, the converted size the calculator gave you could be wrong.
This is because the bras are built to fit more petite bodies.
Why Do Bra Sizes Differ From Store to Store?
Women around the world tend to struggle when shopping for a bra.
This is because bras come in a wide variety of shapes, sizes, and price tags.
And, as Lady Luck would have it, sizing can be drastically different between two products from the same manufacturer.
If you’re wondering why this happens and why some stores go to size G while others have up to size L or O, here’s the reason: there are no industry-standard sizing specifications for bras.
This means that every designer and manufacturer can size the bra according to their own ideals.
Only a few bra stores, like UK-owned Bravissimo have designs that are tested then sized based on the results.
In other words, don’t be upset if you see your cup size increase or decrease while trying one multiple bras in the fitting room.
It doesn’t mean anything beyond the way the product itself was sized.
Hopefully, you now know that the smallest bra cup size available is the AAA and that the largest is either N or O.
There is a wide variety of cup sizes out there for every style of bra, though you will find that the larger the difference between your over-bust and under-bust, the harder it will be to locate your size.
When in doubt, visit a specialized store that carry the largest bra sizes around.
Frequently Asked Questions about Bra Cup Sizes
What is the largest bra size?
Technically, there is no limit to how big a bra size could be.
There are over 250 bra sizes to choose from.
Presently, the largest bra size ever recorded is 102ZZZ, belonging to Annie Hawkins-Turner (Norma Stitz), a woman from Atlanta, Georgia.
She holds the Guinness World Record for the largest natural breasts.
As you might have guessed, Hawkins-Turner has her bras specially made, as no store would carry her size.And if we’re talking about the average largest bra size available in stores, that is usually a 40DDD at Victoria Secret in the United States.
The UK store Rigby and Peller released a 48N bra in April 2011, which is larger than both a US 46H and an EU 105I, though 58O is available at some online bra stores.
The next cup size following a DD (which is E in EU/UK sizing) is the DDD/E/F size.
After that cup size is G, H, and in some cases I, K, L, M, N, then O.
What’s the biggest cup size for bras?
The biggest cup size available for bras depends on where you are located.
Currently in the US, the biggest cup size regularly available is O, which indicates a 15-inch difference between your bust and the band of the bra.
What is the letter in bra size?
The letter you see after the number indicates the cup size of the bra.
Cup sizes can range through AA to N in most countries, including the US, and it refers to how many inches larger the bust is to the size of the band.
The cup size doesn’t have anything to do with the volume of the breasts; it’s measuring proportion.
This is why a 36C has larger cups than a 34C.