How Big Is 34A Bra Size?

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It can be frustrating to find the right bra size and also find a bra that fits you properly, especially if you are an uncommon bra size. Think you might be a 34A? Pull up a chair, because I discuss exactly how big a 34A is in my article below.

How Big Is 34A Bra Size?

A 34A bra has a band measurement of 33-34 inches and a bust measurement of 35 inches. 34A is on the smaller side of the bra size scale, but is also considered one of the most versatile bra sizes.

Graphic image of a woman wearing a blue tank top and black shorts with a text explanation that a 34A bra size has a bust size of 34-35 inches and band size range of 33-34 inches

Types of Bra Styles for 34A

There is a wide range of styles available in 34A bras. Some of the most popular styles include T-shirt bras, demi cup bras, plunge bras, bralettes, multi-part cup bras, and sports bras.

  • T-shirt bras: This style is a great everyday workhorse bra that gives support without extra padding or push-ups.
  • Demi cup bras: 34A bras with the best demi-cup design give the same support as full-coverage bras, although they expose more of the bust area. This style of bra is also good for everyday use and work.
  • Plunge Bras: These styles push up your breasts to create more cleavage which looks great under your V and boat neck tops.
  • Bralettes: This style of bra offers light support, and can be lined or unlined. These bras are great for lounging and at-home wear. 
  • Multi-part cup bras: This bra style offers more cup coverage than a demi cup bra, though they are still low cut enough to wear under revealing necklines. This type of bra is best for low necklines, halters, and dresses.
  • Sport bras: This style of bra is designed to support 34A breasts during physical activity.

For women with average sized frames with really small breasts, like a 34A, we recommend having an awesome push up bra. Here’s one with serious lift – the FallSweet Add Two Cups Bras Brassiere, that will give you some serious cleavage for a night out on the town.

For women with average sized frames with with really small breasts, like a 34A, I recommend having an awesome push up bra. Here’s one with serious lift – the FallSweet Add Two Cups Bras Brassiere. You’ll get some serious cleavage for a night out on the town (no joke).

Is 34A Small, Medium, or Large?

The 34A cup size is small, though it is bigger than 28A, 30A and 32A bra sizes. Many people think that cup sizes tend to be the same, that an A cup is an A cup no matter what. This is not true, as breast sizes do increase as the band size increases.

You might not be sure whether you are a 32A or 34A size bra, which is the same cup size but different band sizes. Let’s discuss the differences in these two calculations:

What Is a 34A Bra Size Equivalent To?

A 34A bra size is also equivalent to 32B and 36AA. If the bra you want is not available in a 34A, you can always try out your sister sizes.

When using sister sizing, you will go up a band size and down a cup size (36AA),  or down a band size and up a cup size (32B). The following chart provides you with the sizing details of the 34A bras, and the equivalent size down and size up. 

34A Bra Size Details

34A Bra SizeDetails
Underbust30-31 inches
Overbust34-35 inches
Size down32B
Size up36AA
Graphic image that has 3 white dummies which corresponds to 32B, 34A, and 36AA as the sister sizes of a 34A cup size

Related Questions

How Can I Make My 34A Breasts Look Bigger?

You can stuff your bra or wear padded bras to make your 34A breasts look bigger. The key is to wear thinly-lined bras to help accentuate your breast shape. You may consider bralettes, bandeaus, or triangle bras.

What Does a 34A Bra Size Look Like?

A 34A bra size may only look like a small bump. Your 34A breasts might stand out more if you have a flat stomach or a smaller lower body. On the other hand, your 34A breasts may look significantly smaller if you have wider hips or waistline.

Who Are Famous People With a 34A Bra Size?

Actresses Madelyn Cline and Vanessa Hudgens are among the famous people with a 34A bra size. Singer Olivia Rodrigo and wrestler Ronda Rousey also wear 34A bra sizes.

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

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


34A bras are one of the most commonly worn bra sizes. Though a 34A cup size is smaller, there are many bra styles available to choose from that will work great for this bra size. The 34A is very versatile.


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.