What Bra Size Is Keira Knightley?

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Keira Knightley is an award-winning actress best known for period dramas. She gained recognition for her performances in Bend It Like Beckham, Pride & Prejudice, Love Actually, and Pirates of the Caribbean.

As a body positivity advocate, she’s not afraid to style her body her way. In this article, I’m going to look into Keira Knightley’s bra size and how it influences her work costumes.

What Bra Size Is Keira Knightley?

Keira Knightley has a bra size of 32A. Her small breasts let her wear bras with A cups. Her band measures 28 to 30 inches, while her overbust ranges from 28 to 32 inches.

Graphic image of Keira Knightley with 32A bra size wearing a white half-sleeve dress

The English actress has a conical breast shape because there’s minimal breast tissue in her 32A bust. With a rectangular body, her chest looks almost flat. Likewise, fellow actress Selma Blair also wears a 32A bra, and Brittany Murphy who also wears a 32A bra for their small breasts.

Despite both having a 32-inch band size, Keira Knightley is one cup smaller than her The Edge of Love co-star Sienna Miller, who has a 32B bra size. Instead, Knightley can size up to 34AA when wearing sports bras or go down to 30B for t-shirt bras.

Keira Knightley Measurements

Keira Knightley is average in height, measuring in at 5 feet 7 inches (5′ 7”). It’s estimated that her body measurements are 33-23-33 inches, which translates to a bust size of 33″, a waist size of 23″, and a hip size of 33”. She weighs roughly 119 pounds.

Benefits of Small Breasts

Easier to Buy Clothing

Whether you’re shopping online or in stores for clothing, tops and dresses are often initially designed for women with smaller boobs. This gives you more options, and it also means that you won’t need to worry about getting custom-tailored clothing most of the time.

Minimal Bounce During Workouts

One huge benefit of having small breasts is that they hardly affect athletic performance because of their lack of bounce. It can be painful to have your boobs bouncing around as you work out, and women with small chests don’t have to experience this pain. Plus, small boobs mean you can wear pretty much any sports bra style, even if it has minimal padding.

Can Easily Sleep On Your Stomach

Another advantage of having small breasts is that you can comfortably sleep on your stomach without it being painful on your chest. There’s no need to toss and turn at night to prevent squashing your breasts. It’s also fairly easy to choose sleep clothes.

Drawbacks of Small Breasts

Might Feel Self Conscious

It’s normal to feel self-conscious about having small breasts, particularly if you truly want to have large boobs. This can sometimes make you focus on looking for bras that can volumize your breasts regardless of the fit. However, small breasts can be as sexy as other breast sizes.

Breasts Stay Small as You Gain Weight

If your breasts are dense with tissue, they won’t grow in size even as you gain weight. In turn, they may look significantly smaller as you gain more fat in other parts of your body. However, if you lose weight, the fat in your breasts may also reduce, causing your boobs to become even smaller.

Don’t Have Much Cleavage

A to B cup sizes don’t have prominent cleavage like larger breast sizes, even when wearing a plunging V-neck dress. In order to make it look like you have cleavage, you need to wear padded or push-up bras to make your bust look bigger.

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


Keira Knightley has a 32A bra size. Having small breasts makes it easy to find costumes for her roles. She can either go braless or use padded bras to achieve the necessary effect for her work.


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.