What Bra Size Is Jessica Alba?

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Jessica Alba is an American actress and entrepreneur. After rising to prominence from her lead role in Dark Angel, she continued landing breakthrough roles in Fantastic Four, Good Luck Chuck, and Valentine’s Day.

She’s vocal about having body insecurities throughout her career, even during pregnancy. With this in mind, I’m going over Jessica Alba’s bra size and what it means for her body.

What Bra Size Is Jessica Alba?

The bra size of Jessica Alba is 34B. This indicates she wears bras with B cups to support her bust, which measures 33 to 34 inches. She also needs a band that ranges from 30 to 32 inches.

Jessica Alba wearing a floral tube dress at a movie premiere

Alba’s 34B breasts look slightly perky because her invented triangle physique narrows her broad bust line through the hips. In contrast, fellow actresses Gabrielle Christian also has a 34B bra size and Emily Blunt also has a 34B bra, yet their slim build creates a flat bust.

The sister sizes for 34B breasts are 32C and 36A. This means she can have similar bra styles to her Valentine’s Day co-star Anne Hathaway, who wears a 32C bra. Jessica Alba can switch between these sizes when using push-up and normal bras.

Jessica Alba Measurements

Jessica Alba is average in height, measuring in at 5 feet 7 inches (5′ 7”). I estimate that her body measurements are 33-24-33 inches, which translates to a bust size of 33″, a waist size of 24″, and a hip size of 33”. She weighs roughly 123 pounds.

Benefits of Small Breasts

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.

Don’t Have Side Boobs

If you love wearing tank tops, bikini tops, and sleeveless dresses, side boobs can get in the way of having a flawless silhouette. When your breasts are small, there’s less of a chance you have to worry about the dreaded side boob. You can wear anything without thinking about side boobs or bulges.

Little to No Sagging

Gravity is the enemy of breasts, especially since it can cause sagging. However, it won’t affect small boobs as much, and it’s unlikely for your small breasts to sag even when going braless. Whether you have A or B cup breasts, your boobs will look naturally firm and perky as you age.

Drawbacks of Small Breasts

Don’t Always Fill Out Clothing

Despite its several benefits, among the most notable disadvantages of having small breasts is the chance that you won’t fill out bra cups or clothing. Particularly when the breast tissue is leaning toward the bottom, the shallow bustline can cause gaping cups.

Might Experience Breast Asymmetry

As you develop breasts, it’s normal for you to experience breast asymmetry. However, this can continue even as you reach adulthood, where the volume of one breast can be smaller than the other. There’s also the possibility that cleavage may veer toward the sides. When you are small chested, every ounce of boobage counts, so having asymmetrical breasts can be frustrating.

Have a Less of a Figure

Small breasts can give your physique a straight, slim appearance. If your shoulders and hips are the same width, having a flat chest can also make you feel shapeless. Because of this, you might find yourself gravitating towards wearing push up bras most of the time.

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


Jessica Alba has a 34B bra size. Her 34B breasts aren’t that heavy, yet there’s enough breast tissue to form a cleavage. This lets her experiment with a range of bra styles.


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.