6FF Bras – Full Support Without Compromise
Shopping for 6FF bras can feel overwhelming if you’ve never seen your size represented properly. At The Foundation, we’re here to change that. We celebrate fuller cup sizes with bras that deliver comfort, lift, and support – without sacrificing style. Whether you prefer lace, seamless, wire-free or structured, you’ll find pieces that fit your shape and elevate your everyday.
Understanding the 6FF Bra Size
A 6FF bra combines Australia’s smallest band size (6) with a very full cup volume (FF). It’s a rare but real size, often overlooked by mainstream retailers. Many people confuse cup size with bust size alone – but cup volume is relative to band size. For instance, a 6FF has significantly more breast volume than a 10DD or 8E, even though the cup letters might appear similar.
If you're shopping for your perfect size, it's key to understand how the bra size systems work. The majority of bra sizes on the market cater to a narrower range, but we proudly offer a broader size range including 6FF to ensure no one is left out.
International Bra Size Conversion for 6FF
| Region | Equivalent Size |
|---|---|
| UK | 28FF |
| US | 28H |
| EU | 60H |
| FR | 75H |
Different countries follow unique systems, which is why our international bra size converter and international size chart make it easy to find your Australian size match.
How to Measure for a 6FF Bra
Finding your perfect fit starts with accurate measurements:
- Measure your underbust snugly in centimetres to determine your band size.
- Measure around the fullest part of your bust to get your bust size.
- The difference between these measurements indicates your cup size.
This is where tools like our bra size calculator and international bra size chart come in handy. If you’re in-between, check our underwear sizes guide to explore adjacent fits.
Cup Type & Shoulder Strap Type Considerations
When shopping by cup type, make sure to match your needs with your daily wear. 6FF cup size bras are available in full-cup, balconette, and plunge types, with supportive shoulder strap types including wide straps, padded straps, and racerback styles – all designed for comfort and uplift.
Brands That Offer 6FF
We stock inclusive, high-quality lingerie brands that design specifically for fuller busts. You’ll find 6FF options in brands like Empreinte, PrimaDonna, Chantelle, Simone Perele, and Triumph. These collections prioritise function and fashion, with innovative materials and strategic cuts that support and shape.
Type of Bra Styles Available in 6FF
- Full-cup bras for maximum all-day hold
- Plunge bras that flatter deeper necklines with added structure
- Wireless comfort bras designed for lounging and low impact
- Bra-sized women's swimwear so your summer wardrobe fits like your favourite lingerie
Explore our full collection of 6FF bras now.
What If I Can’t Find My Exact Size?
Sometimes sister sizes help you find your usual size in another band or cup. For 6FF, try:
- 8F – slightly looser band, same cup volume
- 4G – firmer band, slightly more depth
This sizing flexibility is ideal if you're fluctuating or in-between.
Why Fit and Style Matter for FF Cups
With a fuller bust, a proper bra fit impacts more than just comfort – it can influence posture, confidence, and silhouette. That’s why we stock bras with reinforced seams, double-lined cups, and specially contoured underwire that aligns with the structure of your bust.
Need Help Finding the Right Fit?
Still unsure about your bra size? Our Size Guide explains everything from Australian size to underwear size systems, helping you decode bras from any brand. You can also speak with our team or visit in-store for a personalised fitting session. Our expert bra fitters are here to make your experience seamless and supportive.
Frequently Asked Questions About 6FF Bras
Is 6FF a common size?
It’s not widely carried in chain stores, but it's a critical part of our inclusive range. We make it easy to find bras that feel made for you.
What styles are best for a 6FF bust?
Full-cup and balconette bras offer strong support. Plunge bras with built-in reinforcement also work beautifully.
Can I wear a bralette if I’m 6FF?
Yes! Look for structured bralettes made for larger cups with a firm band and inner lining for support.
Do bra sizes vary across brands?
Absolutely. Each label may interpret sizing differently, which is why the bra size systems differ slightly. Always refer to our chart.
How do I know if 6FF is my correct size?
Use our bra size calculator or international size chart, or get professionally fitted to make sure you’re getting the support and comfort your bust needs.