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Bra Fit Guide

Last Updated: 19 June 2025 • 2 min read

Beneath every flawless outfit is a bra that fits like a dream. The right lingerie is the foundation of every feel-good fashion moment, offering support where you need it most, uplifting your day (literally) and delivering long lasting comfort. Whether you’re searching for a new silhouette or looking to sure up your sizing, explore our bra fitting guide to find out how your bra should fit, learn how to measure yourself at home, and discover the best bras for every body shape. 

How Should a Bra Fit?Signs of a Poor FitMeasuring at HomeBra Size ChartThe Right Everyday BraEveryday HeroesSports BrasFAQs

Are you wearing the right bra size?  

Baffled by bra sizes? Find cup options confusing? Well, you’re not alone! With an estimated 80% of women wearing the wrong bra size, it’s clear that finding the perfect fit isn’t as easy as A,B,C or DD. Our boobs are as unique as each of us, with a whole spectrum of symmetries, sizes and shapes, when it comes to how a bra should fit, one size definitely doesn’t fit all!   

Age, pregnancy, lifestyle changes and menopause are just a few of the factors that can cause the shape and size of your boobs to change over time, so it’s important to check regularly whether your bra feels like the right fit for you, always remember, comfort is key and you are so much more than a measurement!  

Finding the perfect bra size for you is essential to feeling your best every day and comes with a whole host of other benefits. Boosted confidence (and cleavage)? Check. Improved posture? Sure thing. Enhanced support (and less sagging)? You bet.  

How your bra should fit  

When a bra fits right, you shouldn’t have to think about it!  There’s no fidgeting, no adjustments, no digging in, just a subtle sense of support, a little extra lift and all-day comfort you can count on. The perfect bra for you will keep you feeling like your best self - from fastening-up ready to slay the day, to the long awaited unclip when you come home.  

Underwire

This should sit flush on your ribcage between each armpit, supportive but never suffocating. You should comfortably be able to run two fingers underneath.

Cups

The perfect cup should be sculpted to your shape, no spillage, no gaps, seamlessly enclosing each breast within them.

Back band

A well-fitting back band should sit firmly level with no riding up. We suggest fastening a new bra on the loosest hook to start, giving you room to tighten it later as the band naturally stretches with regular wear and washing.

Straps

Correctly adjusted straps should feel snug and secure with no slips or shoulder pinching!

Signs of a poor fitting bra

Biting straps, wandering bands and cups that cling too tight – we’ve all been there! A poorly fitting bra can leave you constantly adjusting yourself just to make it through the day, but the cause of these underwear woes isn’t always clear. Here are the most common signs that it’s time to break up with your bra: 

How to measure your Bra size at home

Gone are the days of daunting dressing room appointments, today you can discover the best bra size for you from the comfort of your home. All you’ll need is a mirror, a soft measuring tape and a few topless minutes. Let’s get into it! 

Measure your under bust

Wrap the tape measure around your torso where your underwire and back band would usually sit, make sure it’s snug to your skin but not too tight. This gives you your band size.

Measure your bust

Use the same technique to measure the fullest part of your breast, making sure the tape measure is level all the way around.

Calculate your cup size

Using the chart below for guidance, subtract your band measurement from your bust measurement to find your perfect cup size. Each inch of difference is equal to one cup size, for example, 1 inch = A cup, 2 inches = B cup, 3 inches = C cup etc.

Bra Size Chart

Calculate your cup size

Bust Band difference (Inches)

UK and AU Cup Size

Bust Band difference (CM)

US Cup Size

Less than 1

AA

10 to 11

AA

1

A

12 to 13

A

2

B

14 to 15

B

3

C

16 to 17

C

4

D

18 to 19

D

5

DD

18 to 19

E or DD

6

E

20 to 21

For DDD

7

F

22 to 23

G or DDDD

8

G

24 to 25

H

9

GG

24 to 25

I

No measuring tape? No problem! Put on your best fitting bra and assess how it fits. Armed with the tips from our “How Your Bra Should Fit” section, working out the right fit for you will be a breeze! Remember, it’s less about numbers and more about listening to your body and tuning into your unique shape. 

Choosing the right everyday bra for your shape 

Are balcony styles your bestie? Racer Backs your ride or die? Triangle bra’s totally your thing? Finding the right style to suit your shape is just as important as understanding your perfect size. Whether you’re looking to perk things up, step up the support or perfect your posture, the right everyday bra should feel like a second skin, ticking all the right boxes without ever compromising on comfort! 

Smaller busts

For our smaller bust sisters, the below bras are the perfect pick to enhance your natural shape, lend a little lift, or provide a smooth, comfortable fit!

Push-Up Bra

A push-up bra uses padding or a graduated cup design to lift the bust and create fuller-looking cleavage, perfect for enhancing your natural shape, creating curves and adding volume!

Shop Push-Up Bras

Bralette

A sleek and stylish alternative to traditional bras, bralettes are ideal for those with smaller busts, offering light support while looking chic under casual outfits. And with no wires in sight, they get top marks in the comfort category.

Shop Bralettes

Triangle Bra

A soft triangular shaped cup that gently supports and enhances your natural bust shape. This sophisticated style offers a more delicate, feminine look without adding volume.

Shop Triangle Bras

Fuller Busts

Blessed in the breast department? Then you’ll need a little extra support and coverage to stay comfortable throughout the day. The right bra for fuller busts can help lift, structure, and even smooth without sacrificing on style.

Full Cup Bra

As the name suggests, a full coverage bra is designed to cover most of the breast, offering maximum support and preventing spillage or gaping. It helps distribute the weight of a larger bust evenly across the shoulders and back, reducing strain.

Shop Full Coverage Bras

Underwire Bra

The perfect pick to perk up your day! An underwire bra gives your bust the structure and support it craves while adding just the right amount of definition. Whether you’re rocking a fitted top or a blouse, this bra keeps everything in place and looking smooth.

Shop Underwire Bras

Minimizer Bra

Looking for a more streamlined silhouette? A minimizer bra is your go-to for redistributing the bust and making it appear smaller, all while keeping things super supportive. It’s a secret weapon under those button-down shirts and form-fitting tops.

Shop Minimizer Bras

Side Support Bra

Designed with high sided panelling to gently guide your bust inwards, side support bras are the perfect choice for forward projection and sensational uplift. They’re an especially great pick for wide set breasts, preventing spillage while offering a smooth, well-supported silhouette.

Shop Side Support Bras

Everyday Heroes

From bras for special occasions to the ultimate date night pick, these are the shapes and styles no top drawer should do without!  

Non-Wired Bra

If Netflix and chill was a bra! Offering natural, yet secure support, the non-wired bra is all about comfort. The ideal pick for laid-back lounge days or for those who prefer a softer feel, it provides gentle lift and freedom of movement, without compromising on shape.

Shop Non-Wired Bras

Strapless and Multiway Bra

The ultimate wardrobe multitasker! Strapless and multiway bras adapt to your outfit needs, offering versatile support with removable straps that can be worn in different ways. Whether it’s off-the-shoulder, halter, or simply strap-free, these bras are a life saver for all those special occasion outfits!

Shop Strapless and Multiway Bras

Plunge Bra

With a low neckline to enhance cleavage, the plunge bra was designed for date night dressing! It lifts and shapes while staying discreet under daring necklines, adding a touch of allure without sacrificing support.

Shop Plunge Bras

Moulded & T-Shirt Bra

Seamless and smooth, T-shirt bras create a flawless silhouette beneath your favourite fitted tops. With lightly padded cups that shape and support, they’re perfect for everyday wear when you want incognito comfort.

Shop Moulded & T-Shirt Bras

Balcony Bra

A flattering choice for all bust shapes, the balcony bra especially shines for those with slender or wide-set breasts. Its open neckline and angled cups lift and enhance your natural shape, making it the perfect all-rounder!

Shop Balcony Bras

Specialist Bras

Certain stages of life require special attention. You may be shopping for your pre-teen, preparing to purchase their first bra, navigating the maze of maternity options or getting ready for surgery and looking for the best post-op bra to support you on your healing journey. Wherever you’re at, our specialist bras are here to cheer you on through each chapter.

Shop Specialist Bras

Sports Bras

With the right sports bra, your boobs never need to be a barrier to working out. Whether you’re a seasoned street pounder or more of a yoga and chill kinda gal, there’s a sports bra to match your pace. Below, we’ll talk you through the best picks for each performance level. Ready, set, go! 

High-Impact Sports Bra

Ready to take your workout up a gear? Our high impact sports bra’s got your back (and your bust!). It gives you maximum support for high-energy activities like running and HIIT sessions. No bounce, no discomfort- just pure performance.

Shop High-Impact Sports Bras

Medium-Impact Sports Bra

The best choice for more mellow movements. Whether you're gearing up for a cycle, powering through pilates or heading out on a hike, a medium impact sports bra has got you covered with solid support, breathability, and just the right amount of stretch.

Shop Medium-Impact Sports Bras

Low-Impact Sports Bra

Taking it easy never felt so good! Designed for gentle activities like yoga, stretching, or casual strolls, a low-impact sports bra offers light support with maximum comfort. It’s all about freedom of movement and breathable fabrics, so you can stay relaxed and supported without feeling restricted.

Shop Low-Impact Sports Bras

Compression Sports Bra

For when you want to be held extra tightly! Compression sports bras flatten and hold your bust firmly against your chest, minimizing bounce during your most intense training sessions. Perfect for smaller busts but still super supportive for larger ones, this bra offers tight, no-bounce support.

Shop Compression Sports BrasShop All Sports Bras

Straps Up - You’ve Got This!  

Now you’ve done the research, you’re ready to spot all the bra fit red flags! Kiss goodbye to clingy cups and badly fitting bands and embrace confidence soaring silhouettes that flatter your natural figure. Remember, the right bra for you is so much more than numbers and letters; it’s about tuning into your unique shape, trusting your measurements, and embracing the bra style that empowers your everyday! 

Found your ultimate fit? Dive into our cup-sized swimwear to get set for seriously flattering, sun-ready style. Or discover our lingerie hub to elevate your base layer expertise, explore the latest styles and find the perfect matching set! 

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