As the average bra size in the US keep increasing, the 34D bra size is quickly becoming one of the most common ones. It’s a highly desirable bra size, due to its attractive, larger size.
In this article, we look at how big 34D breasts are, how to measure if you should be wearing a 34D bra, what are the sister sizes of this bra, what 34D boobs actually look like, and much more about this bra size.
What Is a 34D Bra Size?
A 34D 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 38 inches.
Let’s explain this so that it’s clearer.
Bra sizes consist of a “number” component and a “letter” component (for example, 34D, 34C, 38D). You need to get both of these right.
Here’s how to correctly measure your bra size:
The first thing you need to do is measure your band size. To do this, wrap a tape measure around your rib cage, just below your breasts. Make sure that the tape measure is snug but not too tight. Take note of the measurement in inches.
If you get an odd number, increase it by 1 to get to an even number, since that’s how bra sizes are usually defined (for example, if your band size is 33, round it up to 34).
This number will be your band size.
In a 34D bra size, the band size measured like this will equal 34 inches.
The next step is to measure your bust size. To do this, wrap the tape measure around the fullest part of your bust. Make sure that the tape measure is straight and parallel to the ground. Take note of the measurement in inches.
In a 34D bra size, the bust size measured as explained here will be equal to 38 inches.
Now that you have your band and bust measurements, you can determine your cup size. Subtract your band measurement from your bust measurement.
The difference between the two measurements will give you your cup size, as shown in the table below. If the difference is 1 inch, you’re an A cup size, if it’s 2 inches, you’re a B cup size, and so on.
In a 34D bra size, the difference between the bust size and the band size is 4 inches (38 inches – 34 inches = 4 inches). That’s where the “D” in “34D” comes from. The “34” in “34D” comes from the band measurement.
More About the 34D Bra Size
Most D cup sizes, including the 34D, are considered very attractive. Most surveys confirm this, pointing to the D cup size as one of the most desirable. This is due to their larger size, which is generally considered attractive when it comes to breasts.
The 34D is also a fairly common bra size, so the selection of bras is huge.
What 34D Boobs Look Like? (34D Bra Size Examples)
You’re probably wondering what 34D 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.
Among those, a very prominent example is American actress Sydney Sweeney. As she is reportedly a 34D bra size her band size is 34 inches and her bust is 38 inches.
Another actress who is a 34D bra size is Jenny McCarthy
34D Sister Size (34D Bra Size Equivalent)
The closest sister sizes of the 34D are the 32DD and the 36C. The 32DD is one cup size larger and one band size smaller, while the 36C is one cup size smaller and one band size larger. Other sister sizes of the 34D are the 30DDD, 38B, and 40A.
If you’re not familiar, sister bra sizes are different sizes that have the same cup volume. For example, the 32DD, 34D, 36C, 38B, and 40A 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 34D bra is tight, try a 36C.
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 34D bra is loose, try a 32DD.
34D Bra Size in Cm (34D Bra Size in Europe)
Measured in centimeters, a 34D bra size means that your band measurement equals ~86 cm (equal to 34 inches, which is where the “34” in “34D” comes from) and your bust measurement equals ~96 cm. The difference between the bust size and the band size is roughly 10 cm, which translates to a D cup size.
34D Bra Size in Inches
Measured in inches, a 34D bra size means that your band measurement equals 34 inches (that’s where the “34” in “34D” comes from) and your bust measurement equals 38 inches. The difference between the bust size and the band size is 4 inches, which translates to a D cup size (that’s where the “D” in “34D” comes from).
34D vs 34C
A 34D bra size and a 34C bra size both have the same band measurement of 34 inches. But, a 34D bra size has a bust measurement of 38 inches, while a 34C bra size has a bust measurement of 37 inches.
Given this, a 34D bra size is one cup size larger than a 34C bra size. In other words, 34D boobs are one inch larger than 34C boobs.
34D vs 34DD
A 34D bra size and a 34DD bra size both have the same band measurement of 34 inches. But, a 34D bra size has a bust measurement of 38 inches, while a 34DD bra size has a bust measurement of 39 inches.
Given this, a 34D bra size is one cup size smaller than a 34DD bra size. In other words, 34D boobs are one inch smaller than 34DD boobs.
34D vs 36C
A 34D bra and a 36C bra are sister sizes. More specifically, the 36C bra is one sister size up from a 34D. This is because a 36C bra is one band size up, but one cup size down from a 34D bra size.
32DD vs 34D
A 34D bra and a 32DD bra are sister sizes. More specifically, the 34D bra is one sister size up from a 32DD. This is because a 34D bra is one band size up, but one cup size down from a 32DD bra size.
32D vs 34D
A 34D bra size and a 32D bra size both have a 4-inch difference between the bust size and the band size. But, a 34D bra size has a band measurement that’s roughly 2 inches larger compared to the 32D (34 inches compared to 32 inches). Also, a 34D bra size has a bust measurement that’s 2 inches larger compared to the 32D bra size (38 inches compared to 36 inches).
34D vs 36D
A 34D bra size and a 36D bra size both have a 4-inch difference between the bust size and the band size. But, a 34D bra size has a band measurement that’s roughly 2 inches smaller compared to the 36D (34 inches compared to 36 inches). Also, a 34D bra size has a bust measurement that’s 2 inches smaller compared to the 36D bra size (38 inches compared to 40 inches).
34D Bra Size Infographic
FAQ
What Bust Size Is a 34D?
A woman wearing 34D will have a bust size of 38 inches (96 cm). Her band size will be 34 inches, which means that the difference between the bust size and the band size will equal roughly 4 inches (that’s why the cup size equals D).
What Is the Next Bra Size From 34D?
If you go one band size larger, the next bra size from 34D is 36D. If you go one band size smaller, the next bra size is 32D. On the other hand, if you’re referring to cup sizes, the next bra size from 34D is 34DD (one cup size larger) or 34C (one cup size smaller).
Is 34d Medium or Large?
The 34D bra size can be considered a larger bra size, although it depends. For example, in countries such as the US, a 34D bra size is just above average. On the other hand, in most of the world, a 34D bra size is very large.
Is 34D Bigger Than 36C?
34D has a bigger cup size than a 36C bra size by roughly 1 inch. But, a 36C has a bigger band measurement. The 34D and the 36C are sister sizes, meaning that they’ll hold roughly the same amount of breast tissue.
Which Is Bigger 34D or 36D?
A 36D is a bigger bra size than a 34D. This is because a 36D bra size has a band measurement of 36 inches (while a 34D has 34 inches) and a bust measurement of 40 inches (while a 34D has 38 inches).
Conclusion
In this article, you learned all you need to know about one of the most desirable bra sizes out there, the 34D bra size. Among other things, you learned how big 34D breasts actually are, how to measure if you should be wearing a 34D bra, what are the sister sizes of this bra, and what 34D 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.