Among the large bra sizes, the 34DD bra size is one of the most common ones. Due to their size, 34DD boobs are considered very attractive. On the other hand, in some cases they may cause back or neck pain.
Here, we look at how big 34DD breasts are, how to measure if you should be wearing a 34DD bra, what are the sister sizes of this bra, what 34DD boobs actually look like, and much more about this bra size.
Let’s dive in!
What Is a 34DD Bra Size?
A 34DD bra size is the bra size where the band measurement (measured right under the breasts) equals 34 inches and the bust measurement (measured at the center of the breasts where they’re the largest) equals 39 inches.
Let’s make this more understandable.
As you may already know, bra sizes consist of both a “number” part and a “letter” part (e.g., 34D, 34DD, 38DD, etc.). Let’s ensure both components are accurate.
Begin by taking a measuring tape and wrapping it around your ribcage, just below your bust. Ensure the tape is snug but not overly tight. Stand upright naked for the most accurate measurement.
If you get an odd number, round it up to the nearest even number. This is necessary because bra sizes generally use even numbers. For instance, if you measure 33 inches, round it up to 34 inches.
In a 34DD bra size, the band size measured like this will equal 34 inches.
Next, measure your bust size. Wrap the measuring tape around your back and across the fullest part of your bust. Ensure the tape is parallel to the ground and not too tight.
In a 34DD bra size, the bust size measured as explained here will be equal to 39 inches.
To determine your cup size, subtract your band size from your bust size. The difference between these two measurements represents your cup size. Consult the table provided below for reference. For example, a 1-inch difference indicates an A cup size, a 2-inch difference signifies a B cup size, and so on.
In a 34DD bra size, the difference between the bust size and the band size is 5 inches (39 inches – 34 inches = 5 inches). That’s where the “DD” in “34DD” comes from. The “34” in “34DD” comes from the band measurement.
More About the 34DD Bra Size
Since Western society regards larger breasts as more attractive, the 34DD bra size is a highly desirable bra size.
On the other hand, since it’s not so common, the selection of 34DD bras is smaller compared to B, C, or D cup sizes. Although relatively smaller, the choice of 34DD bras is still quite large.
What 34DD Boobs Look Like? (34DD Bra Size Examples)
At this point, you’re probably wondering what 34DD boobs actually look like. Let’s look at a few celebrities with this bra size.
Since this is a bra size that’s considered very attractive, it’s probably no surprise that women who wear it are considered to have desirable breasts.
One prominent example of a person with 34DD breasts is American actress Kat Dennings. This would put her band measurement at 34 inches and her bust size at 39 inches.
Another prominent example of the 34DD bra size is American actress and singer Jessica Simpson.
34DD Sister Size (34DD Bra Size Equivalent)
The closest sister sizes of the 34DD are the 32DDD and the 36D. The 32DDD is one cup size larger and one band size smaller, while the 36D is one cup size smaller and one band size larger. Other sister sizes of the 34DD are the 30G, 38C, and 40B.
If you’re not familiar, sister bra sizes are different sizes that have the same cup volume. For example, the 30G, 32DDD, 34DD, 36D, 38C, and 40B will all give you roughly the same fit. Since the band size of sister bra sizes increases as the cup size decreases, they can hold a similar amount of breast tissue.
Sister bra sizes can be useful if you can’t find a bra in your exact bra size. In such a case, a sister bra size is an option. Another use case of sister bra sizes is if your exact bra size isn’t comfortable enough even though the cups fit well.
For example, the underband might be too tight or too loose. If the cups fit well but the underband is tight, you can try a sister size up (one band size larger and one cup size smaller. For example, if the band of a 34DD bra is tight, try a 36D.
On the other hand, if the cups fit but the underband is loose, you can try a sister size down (one band size smaller and one cup size larger). For example, if the band of a 34DD bra is loose, try a 32DDD.
34DD Bra Size in Cm (34DD Bra Size in Europe)
Measured in centimeters, a 34DD bra size means that your band measurement equals ~86 cm (equal to 34 inches, which is where the “34” in “34DD” comes from) and your bust measurement equals ~99 cm. The difference between the bust size and the band size is roughly 13 cm, which translates to a DD cup size.
34DD Bra Size in Inches
Measured in inches, a 34DD bra size means that your band measurement equals 34 inches (that’s where the “34” in “34DD” comes from) and your bust measurement equals 39 inches. The difference between the bust size and the band size is 5 inches, which translates to a DD cup size (that’s where the “DD” in “34DD” comes from).
34D vs 34DD
A 34DD bra size and a 34D bra size both have the same band measurement of 34 inches. But, a 34DD bra size has a bust measurement of 39 inches, while a 34D bra size has a bust measurement of 38 inches.
34DD vs 36D
A 34DD bra and a 36D bra are sister sizes. More specifically, the 36D bra is one sister size up from a 34DD. This is because a 36D bra is one band size up, but one cup size down from a 34DD bra size.
34DD vs 36DD
A 34DD bra size and a 36DD bra size both have a 5-inch difference between the bust size and the band size. But, a 34DD bra size has a band measurement that’s roughly 2 inches smaller compared to the 36DD (34 inches compared to 36 inches). Also, a 34DD bra size has a bust measurement that’s 2 inches smaller compared to the 36DD bra size (39 inches compared to 41 inches).
32DD vs 34DD
A 34DD bra size and a 32DD bra size both have a 5-inch difference between the bust size and the band size. But, a 34DD bra size has a band measurement that’s roughly 2 inches larger compared to the 32DD (34 inches compared to 32 inches). Also, a 34DD bra size has a bust measurement that’s 2 inches larger compared to the 32DD bra size (39 inches compared to 37 inches).
34DD vs 34DDD
A 34DD bra size and a 34DDD bra size both have the same band measurement of 34 inches. But, a 34DD bra size has a bust measurement of 39 inches, while a 34DDD bra size has a bust measurement of 40 inches.
Given this, a 34DD bra size is one cup size smaller than a 34DDD bra size. In other words, 34DD boobs are one inch smaller than 34DDD boobs.
34DD Bra Size Infographic
FAQ
What Bust Size Is a 34DD?
A woman wearing 34DD will have a bust size of 39 inches (99 cm). Her band size will be 34 inches, which means that the difference between the bust size and the band size will equal roughly 5 inches (that’s why the cup size equals DD).
What Is the Next Bra Size From 34DD?
If you go one band size larger, the next bra size from 34DD is 36DD. If you go one band size smaller, the next bra size is 32DD. On the other hand, if you’re referring to cup sizes, the next bra size from 34DD is 34DDD (one cup size larger) or 34D (one cup size smaller).
Is 34DD Medium or Large?
The 34DD bra size can definitely be considered a large bra size, although how large it is will depend on the country you’re in. For example, in the US, a 34DD bra size is considered above the average. On the other hand, in most of the world, a 34DD bra size would be considered as huge.
Is 34DD a Common Bra Size?
A 34DD is not a very common bra size, compared to the more common B, C, or D cup sizes. This is true for most of the world. But, in the US it’s much more common than in other countries.
Is 34DD the Same As 36D?
34DD is not the same as 36D. A 34DD bra has a band measurement of 34 inches (this measurement is 36 inches for a 36D) and a bust size of 39 inches (this size is 40 inches for a 36D). However, the 34DD and the 36D are sister sizes, meaning that they’ll hold roughly the same amount of breast tissue.
Conclusion
In this article, you learned all you need to know about one of the larger bra sizes out there, the 34DD bra size. Among other things, you learned how big 34DD breasts actually are, how to measure if you should be wearing a 34DD bra, what are the sister sizes of this bra, and what 34DD boobs actually look like.
The founder, editor, and writer of most articles on Ultimate Bra Guide. An experienced bra fitting specialist turned blogger. My website Ultimate Bra Guide has been featured in relevant publications such as Glamour, Bustle, Elite Daily, Alldaychic, Everyday Feminism, and so on. Get to know me better at our about page.