How Big Are C Cup Breasts?

As an Amazon Associate we earn from qualifying purchases.

Bra cup sizes are determined by two measurements: the distance around your torso in inches which will be your band size, and then the distance around the fullest part of your breasts. The difference between the band and bust size will give your cup size.  With a C cup, there is a difference of 3 inches. C cups are a very common size, and finding bras for C cups is fairly easy. In the article below I discuss exactly how big C cup breasts really are.

How Big Are C Cups?

A C cup is a fairly average bra size. There is a 3-inch difference between the bust and the band size of a C cup.

C cup bra sizes have a 3-inch size difference between the band and the bust measurements

A C cup is a good bra size for women with a smaller frame. Having C cups on a little frame makes your bust appear larger. The best bras for C cups are padded bras, push-up bras and bras that provide additional support.

For women with average sized breasts, like a C cup, having a great, everyday bra is essential. My #1 recommended t-shirt bra is the Calvin Klein Perfectly Fit T-Shirt Bra. It was voted “Top T-Shirt Bra” by New York Magazine!

How C Cup Compares With Other Breast Sizes

  • A cup and a C cup: C cup breasts are two cup sizes bigger than A cup breasts. C cups breasts are a whole two inches bigger than A Cups.
  • B cup and C cup: The C cup breast size is one cup larger than the B cup. A C cup is one inch bigger than a B cup. C cups also weigh a couple pounds more than B cups.
  • D cup and C cup: C cup breasts are one cup size smaller than D cup breasts, making C cups an inch smaller than D cups.

Comparing C Cups vs Other Cup Sizes

Cup Description Weight
A 1-inch difference between the bust and band0.5 pounds per breast
B 2-inch difference between the bust and band0.86 to 2.36 pounds per breast
C 3-inch difference between the bust and band1.13 to 2.63 pounds per breast
D 4-inch difference between the bust and band0.86 to 3.35 pounds per breast

How Do C Cup Breasts Appear

With a difference of 3 inches between the torso and bust, C cup breasts will appear to be different sizes on different women due to various factors.

On a woman with a 30 inch ribcage, C cup breasts will appear larger than they would on a lady who has a 40 inch ribcage. C cup breasts can look bigger or smaller, it all depends on the frame of the woman.

Is the C Cup an Average Breast Size?

C cup breasts, such as 32C and 38C bra sizes are not entirely average. For example, The C cup size is considered larger in Japan as the A cup is their average breast size. In other countries, it is considered smaller. A 34 DD is the average breast size in the United States. The C cup is a very common size in the United States, though it is smaller than the national average size.

Graphic image of a woman holding a pair of large oranges against her chest and explains that C cups weigh around 2.26 pounds

How 32C, 34C, 36C and 38C Sizes Differ

The letter C indicates how much your breasts stick out from the rib cage. C-cup bras are ideal for women with large breasts. However, C-cup bras are not the same size across band sizes, such as 30, 32, and 34. For instance, the cup size of a 38C bra is larger than that of a 36C bra

Typically, this is because the increase in the band size by two represents an increase in cup size by one. That means if the band size of a 34C bra is smaller and you want a larger one, you should consider going for a 36B bra, which is its sister size. 

This is because an increase from 34 to 36 will have led to an increase in cup size by one, yet you don’t want a cup size increase. On the other hand, if you have a 34C and want a larger cup without an increase in band size, consider going for a 34D.

Which Is the Best Cup Size?

Every woman’s breasts are unique, and the best cup size depends on one’s body. For instance, the C cup size is ideal for women with big breasts and might look larger and disproportionate to your body if you are smaller. 

Can I Get C Cup Breasts Through an Implant?

Breast augmentation can help you achieve C-cup breasts as the implants are inserted in the breasts to change their shape or increase their size. In most cases, you will only need moderately-sized implants to achieve a C size from an A size.

Which Is the Best Bra for C-Size Breasts?

If you are looking for the best bra for C-size breasts that you can wear under casual tops and blouses, you can’t go wrong with the Floatley Cozy Adjustable Bra. This bra is wire-free to give you a natural look while providing great comfort and a buttery soft feeling when running errands in town.

With adjustable shoulder straps and back closure, this bra allows you to adjust the length of your bra to suit your torso size, preventing it from digging into your skin. The bra provides full breast coverage, allowing you to wear see-through tops or dresses without the fear of your breast being seen. 

However, the bra band might roll up and become loose after a few wears, rendering it unusable, especially when going for exercises. The bra is designed with stretchy nylon and spandex materials, making it stretchable to fit even after losing or gaining weight.

Related Questions

Is C Cup a Good Size?

A C cup is a good size if you want to wear camisole tops with built-in bras or use boob tape comfortably. It is among the most popular sizes because it’s not too small, yet not that heavy either.

How to Know if You Have C Cup Boobs?

To determine if you have C cups, measure if there’s a three-inch difference between the bust and band. Make sure to measure around your chest’s fullest part.

What Are the Best Bra Styles for C Cups?

The best styles for C cups include triangle, balconette, and push-up bras because they provide ample coverage and shaping. You can also try wearing bralettes or spacer bras.

Bra Size Measurement & Cup Size | A, B, C, D, DD Bra Sizes AND Extra Large Breasts


The C cup breast size is one of the most common breast sizes. C cups appear bigger on smaller frames, and smaller on larger frames. If you are a C cup bra size, you will have many styles and types of bras to choose from.


Allena is the Founder and Editor of The Better Fit, a platform dedicated to empowering women with practical advice on bras and fitness, inspired by her own revelation of the widespread issue of incorrect bra sizing. Her expertise and tips have been recognized by major publications such as Cosmopolitan, Better Homes & Gardens, Insider, and NBC, making her a trusted voice in women's wellness and lifestyle.