How Big Is a 30A Bra Cup Size?

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Looking for the perfect bra can sometimes be troublesome, whether you have a small or large bust. Knowing your bust and band size is essential in getting the right fit. This begs the question, how big is a 30A bra?

How Big Is a 30A Bra?

A 30A bra has a band measurement of 30 inches and a bust measurement of 31 inches. Cup A comes from the one-inch difference between the bust and band. Both breasts may only weigh .76 pound.

Graphic image of a woman wearing a blue tank top and black shorts that has a text explanation that a 30A bra size has a bust range of 30-31 inches and a band size of 29-30 inches

Having a 30A cup is common among women. Understanding its size, appearance, and weight can further help you decide what kind of bra to wear to flaunt your assets.

What Bra Styles Should You Wear With a 30A Bra?

Singer Hayley Williams, actress Georgie Henley, and model Romee Strijd have 30A cup sizes, and it’s not stopping them from wearing the most stylish outfits. The versatility of this cup size enables you to choose different kinds of bras.

An image of a woman wearing a white bralette
  • T-shirt: Due to its barely-there appearance, this style is ideal for 30A bras. A t-shirt bra often has seamless yet sculpted cups, creating a sleek silhouette under figure-hugging clothing.
  • Push-up: A 30A push-up bra lets you show off some cleavage. It uses an underwire and padding to lift the breast upward and center to enhance the breast visually.
  • Bralette: A bralette is an unstructured bra that is typically unlined, wireless, and unpadded. Because a 30A breast size isn’t that heavy, you can wear a bralette as a regular bra or an outwear top without worrying about top and side spillage.
  • Strapless: If you like wearing sleeveless or strapless tops, you can also use strapless bras to avoid pesky straps from ruining a well-prepared wardrobe. It will be easy for bandeaus or tube tops to stay on your bust.
  • Built-in: Some camisoles come with a built-in bra. This means you won’t have to layer several undergarments while ensuring a supportive bra.
  • Adhesives: Even a strapless bra might occasionally be challenging to conceal if you enjoy wearing blouses with intricate necklines or cutouts. In such cases, adhesives like fashion tape, boob tape, and nipple covers are enough for the small size of 30A breasts.

For petite women with really small breasts, like a 30A, 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 30A a Small, Average, or Large Bra Size?

A 30A bra is a small size, especially if you have a shorter torso or a slender frame. Even if there’s a 30-inch band size and a 31-inch bust measurement, it’s still smaller compared to other bra sizes.

Additionally, this cup size may have an average breast weight of 0.38 pounds. Considering these measurements, some flat-chested women of this size may struggle with fitting bras and some clothes.

Some women might not experience extra space at the bottom of the cups, resulting in a more streamlined appearance. Others may have 30A breasts that are too shallow to fill bra cups, which causes wrinkled clothing.

What Do 30A Breasts Look Like?

Breasts in a 30A bra size appear smaller on the chest because they protrude less than those in larger bra sizes. Meanwhile, the breasts may look a bit perkier if you have a flatter stomach.

However, breast tissue distribution, which influences the look of breasts, may depend on factors like body shape, genetics, nutrition, and lifestyle. Even a bra can alter how your breasts look in any piece of clothing.

Moreover, different age groups can have 30A cups, whether you’re in the puberty stage, lactating, or nearing menopause. Fat storage patterns in the bust would vary depending on what’s happening in the body, especially when hormonal changes occur.

An image of a woman wearing a bralette

Related Questions

What Bra Size Is the Same as 30A?

A 28B cup is almost identical to 30A when you size down, although 32AA is the best when you size up. Sizing up means going one band and one cup bigger than your current size. On the other hand, you need a narrower band and a larger cup size when sizing down.

Is 32A Bigger Than 30A?

Because 32A has a substantially greater cup width than 30A, it is larger than 30A. Despite the cup being the same, the torso and back circumferences are larger because of the two-inch difference in band size. The cup sizes can remain the same even if there’s an increase in the band size.

Is 32A Bigger Than 30A?

Although having the same band size, 30A is not larger than 30B because a B cup size is one inch bigger than an A cup size. They may have practically identical body volumes, so you may take these cups into consideration when sister sizing for A cups.

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


A 30A bra is small, measuring 30 inches in the band and 31 inches in the bust. You can find the right bra style as long as you follow the measurements. It’s crucial to select a bra for a 30A bra that strikes a balance between style, comfort, and support.


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.