Bra Fit & Size Guide
Our bodies change all the time and you deserve a bra that feels great every day. Use our step-by-step bra size guide to find your perfect fit, all you need is a tape measure and a lightly padded bra.
How To Measure Your Bra and Cup Size
When you know how to measure your bra size, it’s easy to find something that fits well and looks flattering. Follow these steps to get started:
Step 1: Measure Your Under-Bust
Place a tape measure around your body, directly under your breasts and on your skin.
Ensure the tape measure is straight and firm and breathe out.
Pull the tape measure together under your bust. The number your tape measure reads is your under-bust measurement.
Step 2: Measure Your Over-Bust
Make sure you are wearing a non-padded or lightly padded bra to give you an accurate measurement.
Place the tape measure around the fullest part of your bust.
Hold the tape measure lightly. It should sit straight on your back and feel comfortable but not too tight.
Pull the tape measure together in front of you and breathe out. Check the measurement. This is your over-bust measurement. Repeat this step and check you get the same measurement.
Bra Size Chart
Find your size in the Australian bra size chart below using your under-bust and over-bust measurements. Keep reading to find out how to measure a bra cup and convert your Australian size to international bra sizes.
What’s My Fit Size?
On the chart, use your under-bust measurement to give you your band size, or body size. For example, if you have a 76cm under-bust your band size is a 12.
What’s My Cup Size?
The next step is to move down the column from your band size to find your over-bust measurement. Then, follow the row across to the far left column where you will find your cup size. For example, if you measure 93cm your cup size is 12D.
International Size Chart
Use our easy-to-read conversion chart to help you convert your Australian size.
How To Tell If Your Bra Fits Well
A well-fitting bra should provide reliable comfort and support. Once you know how to measure your bra size for Australian sizing, here’s how to tell if it’s the right fit:
Breast Shape Guide
Explore our breast shape guide and find the perfect bra to match.
Full Figure
Can be round, tear drop or asymmetrical, but they require more support for the back, shoulders and cups. Best styles: Full Coverage, Balconette, T-Shirt and Minimiser.
Relaxed
A softer, less full appearance with nipples tending to point downwards. Best styles: Balconette, Full Coverage and Minimiser.
Teardrop
Fuller below the nipple, with less fullness above. Best styles: Full Coverage, Push Up, T-Shirt and Minimiser.
Wideset
Face outwards, towards the arms - rather than the centre of the chest. Best styles: Plunge, Balconette and T-Shirt.
Athletic
Muscular, firm and typically smaller. They don’t require a lot of support. Best styles: Push-Up, Bralette and T-Shirt.
Asymmetrical
Difference in size and fullness. Best styles: Push-Up, Bralette and T-Shirt.
Round
Even fullness both above and below the nipple. Best styles: All Styles.
Tips For Bra Shopping
Here’s how to find the perfect fit and style for you:
Measure first: Check our sizing guide above for answers to common questions like ‘How do you measure bra cup size?’
Try on different sizes and styles: Sizes can vary between brands and styles, so experiment to see what feels best.
Pay attention to fabric and construction: Soft, breathable fabrics and quality stitching can boost comfort and durability.
Consider sister sizes: If your usual size isn’t quite right, try a sister size (e.g. 12C → 10D or 14B) for a better fit in both band and cup.
Get a professional fitting: A fitting can take the guesswork out of sizing. Visit Myer’s in-store bra fitting service for expert advice.
Bra FAQs
What is the biggest and smallest bra size?
Bra sizes in Australia are based on two measurements: your under-bust (band size) and over-bust (cup size). Here’s an overview of the size range:
- Smallest size: Typically around 8AA – suited to petite frames and smaller busts.
- Largest size: Some specialty brands offer up to a 26H or higher, catering to fuller busts and larger band sizes. Myer has an extensive range of bra sizes to suit different needs. For expert advice on how to size a bra, you can book a complimentary bra fitting in-store with one of our specialists.
How do you know if your bra doesn’t fit?
When you’re not sure how to measure bra size and cup size, you run the risk of getting the wrong fit. Here are some signs that your bra could be the wrong size:
- Band rides up your back
- Straps slip or dig in
- Cups gape or overflow
- Underwire pokes or doesn’t sit flat
- You need to constantly adjust it
If any of these sound familiar, consider trying a different size or style.
Should you wear a bra to bed?
Wearing a bra to bed is entirely a personal choice – there’s no medical reason you have to, or shouldn’t. It depends on what feels most comfortable for you. If you do choose to wear one, opt for something breathable, stretchy and non-wired for a more restful night.
What is sister sizing?
If you try on a bra in your usual size and find it doesn’t fit properly, you might have better luck with one your ‘sister size’. Sister sizing can help you find a more comfortable fit when the cup feels right but the band doesn’t – or vice versa.
Here’s how it works:
- If you go down a band size, go up a cup size. Example: If you usually wear a 14C but need a tighter band, try a 12D.
- If you go up a band size, go down a cup size. Example: If a 12D feels too tight, try a 14C. When you know how measure your bra size, you can experiment with different band and cup sizes to see which combination suits you best. Sister sizing is a helpful trick when your usual size isn’t quite right.
Should I try on bras before buying?
Trying on bras before buying is highly recommended to ensure the best fit. Bra sizes can vary between brands and styles, so what fits perfectly in one may not in another.
If you’re shopping in-store, you can take advantage of Myer’s free bra fitting service. Our knowledgeable experts can measure bra sizes and provide product recommendations to help you find a bra that fits perfectly.
Can I return a bra if it doesn’t fit?
Yes, you can return your bra to Myer with a receipt within 30 days of purchase. For full details, please read our returns policy.
How many bras should I own?
As a general rule, aim for 4 to 6 bras in a mix of styles to cover your needs. A basic collection might include:
- 2–3 everyday bras
- 1–2 T-shirt or seamless bras
- 1 sports bra
- 1 strapless or convertible bra
Extras like bralettes or wire-free bras are great for added comfort or style. Rotating bras between wears also helps them last longer.
How often should I wash my bras?
You don’t need to wash your bra after every wear. In general, aim to wash it every 2–3 wears, or sooner if you’ve been sweating or it feels stretched out.
To keep bras in good condition:
- Rotate between a few bras to give each one time to rest.
- Hand wash or use a lingerie bag on a gentle cycle.
- Always air dry. Heat can damage the elastic.
What type of bra gives the most support?
The most supportive bras typically have these features:
- Full-cup bras: Provide maximum coverage and hold, ideal for larger busts.
- Underwire bras: Lift and shape while offering firm support.
- Wide straps and bands: Distribute weight more evenly for all-day comfort.
- Sports bras: Designed to minimise movement during physical activity. Great for high-impact support.
What’s the difference between wire and wireless bras?
The main difference lies in the structure and level of support:
- Underwire bras: These have a thin, semi-circular wire under each cup to lift, shape and support the bust. Great for everyday structure or larger cup sizes.
- Wireless bras: Skip the wire for a softer, more flexible feel. These bras offer light to moderate support and are ideal for lounging, travel or casual wear.
