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How Big Is a 38B Bra Cup Size?

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Finding your bra size can be a frustrating process. It becomes even more confusing due to the general misconception that the bigger the bra size number, the bigger the boobs. However, that is not the case.

You would be surprised to know that 38B boob size is actually not very large. This leads us to the question, “how big is 38B, really?” 

How Big Is 38B?

Your bra size will be 38B bra if your underbust measures around 34 to 35 inches and your bust measures around 40 inches. Breasts with a B cup size extend around 2 inches from your ribcage and this size is considered average.

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The number (38) is your band size and the alphabet (B) is your cup size. The cup size is determined by the difference between the bust size and band size. Despite the comparatively smaller size, you can achieve amazing cleavage with the right kind of bra, such as push up bras and padded bras

You can find your perfect bra size by measuring your band size and cup size. When you try out the new try, make sure that:

Is 38B an Unusual Size?

A 38B bra size may not be one of the most common bra sizes but it does exist. Simply because women come in all shapes and sizes. What makes the bra size unusual is the combination of a wider back and smaller breasts.

If you have a 38B bra size, chances are that you have a bigger bone structure with less body fat. Compared to C cup sizes, consequently, your cup size is small because of the lack of tissues on your body. However, there are many factors that affect your breast size.

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Regardless, it can be a challenge to find a bra this size in every retail store. Even though we recommend wearing a bra made for your dimensions, we understand that it may not always be possible. In that case you can explore the sister sizes of your bra size. 

What Are the Sister Sizes of 38B?

Sister sizes refers to sizes that have a similar cup capacity. The rule of thumb with sister sizes is that you go up a band size and down a cup size, or the other way around. In this way, the 38B bra size’s sister sizes are 36C and 40A.  

Here is how you can decide which sister size is more appropriate for you:

  • If you fasten your bra using the last hook or the loosest setting, go for a sister size up i.e. 40A.
  • If you fasten your bra using the first hook or the tightest setting, go for a sister size down i.e. 36C.

Conclusion

Women with 34-35 inches band size and 40 inches bust size have the bra size 38B. It is amongst the least common sizes since women with broad backs usually have bigger boobs. Nonetheless, if you cannot find a bra in your size, check out the sister sizes (36C and 40A) to see what feels most comfortable.

   

Hi there, I’m Allena, Founder and Editor of The Better Fit. I’ve always had a passion for finding ways to help women improve various areas of their lives. I have researched and worked to create this website so women would have a place to come and be informed about an article of clothing they literally wear every day.