8F Bra Size – Find Your Perfect Fit
Understanding Bra Size 8F
If you wear an 8K bra size, you're part of a growing community of women looking for better support and a more personalised fit. At The Foundation, we understand how hard it can be to find bras that truly work for smaller bands and fuller cups—and that's exactly why we're here. In Australian sizing, the number 8 refers to your band size, ideal for petite frames, while the K cup indicates a full cup volume for curvy women with a fuller bust. This size combines a narrow ribcage with a generous bust measurement, and it requires bras engineered with advanced support and levels of comfort. Our expert team is dedicated to helping you feel seen, supported, and stylish in every piece we offer.
International Bra Size Chart
Use the table below to see how 8K compares across different size systems around the world. These equivalents are calculated based on industry-standard sister size conversions and sizing logic used by bra manufacturers and fit specialists globally. At The Foundation, we cross-reference these metrics with real customer fitting data and brand-specific size charts to ensure accuracy.
| Region | Size Equivalent |
|---|---|
| Australia | 8F |
| UK | 30H |
| US | 30K (US F) |
| EU | 65O |
| France | 80O |
This international bra size converter ensures you're always choosing the right fit when browsing global brands.
How to Measure Your Bra Size
You can easily measure yourself at home using a soft measuring tape. This fitting guide shows you how to get the most accurate results:
- Band size: Wrap a flexible tape measure snugly under your bust. Make sure the tape is in position and remains tape parallel to the ground. Round to the nearest whole number.
- Bust measurement: Measure around the fullest part of your bust. Keep the tape in position comfortably but not tight.
- Cup size: Subtract your band size from your bust measurement. Each centimetre difference is an approximate cup size, though it can vary slightly by brand.
This process helps determine measurements for bust and measurements for chest accurately. If you're unsure, book a session with our Expert Bra-fitting service in-store or online.
Sizing Chart & Sister Sizes
Our comprehensive sizing chart includes standard conversions and size bust waist hip measurements to help you find your ideal fit. If 8K isn’t available, consider these sister sizes:
- 10JJ (looser band, same cup volume)
- 6KK (tighter band, similar cup volume)
Our personalised customer service team is always ready to guide you through finding the right fit. Reach out through our Contact Page for direct support.
Recommended Bra Styles for 8K
When it comes to fuller bust bras, structure and softness must work together—and that’s exactly what you’ll find with Samanta. Known for thoughtful engineering and elegant finishes, Samanta’s 8K bras deliver on support, lift, and all-day wearability.
Currently available in this size:
- Samanta Full Cup Bras – Designed specifically for fuller busts, these bras offer deep cups, reinforced underwire, and beautiful European detailing.
Each piece is carefully selected to provide everyday comfort, aesthetic appeal, and the confidence of a reliable fit. Explore our full 8K bra collection to see what's available in your size today.
Brands Available in Size 8K
Discover beautifully crafted 8F bras from Samanta—a brand celebrated for its expert construction, thoughtful design, and full-bust support. Each piece is made to deliver comfort without compromising on elegance.
Our customers love the confidence and lift they feel in Samanta bras. As one of them shared:
“The BEST lingerie fitted by the most AMAZING staff.”
Explore the 8K collection today and find your perfect fit..
Shop With Confidence
Every woman deserves lingerie that lifts, shapes, and supports—and our 8K range is here to deliver just that. For tailored guidance, we offer a complimentary bra-fitting service in-store at any of our locations.
To book a fitting, simply visit our store locations page and contact your nearest boutique directly. Our friendly expert fitters will help you find the perfect size and style with care and precision.
Feel confident, supported, and truly seen—because you deserve nothing less.
FAQs
What does an 8K bra size mean?
It refers to a small band size (8 AU) paired with a full cup size (K), indicating a petite frame with a fuller bust.
How do I measure for an 8K bra?
Use a soft measuring tape around your ribcage and bust. Ensure the tape is in position and parallel for accurate bust measuring.
Is 8K hard to find?
At The Foundation, we specialise in hard-to-find bra sizes. For personalised help, visit our contact page.
Are there alternatives to 8K?
Yes, sister sizes like 10JJ or 6KK are great alternatives based on your body size and fit preferences.
What styles are best for an 8K bust?
Fuller bust bras like full coverage, lightly padded, seamless, and sports bras offer the best support and comfort. For new mums, our nursing bras provide easy access with reliable hold.