8G Bra Size – Find Your Perfect Fit
Understanding 8G Bra Size
The 8G bra size is a specialty fit that combines a smaller band size (size 8 in Australian sizing) with a generous G cup, offering significant support for a fuller bust on a petite frame. In Australian sizes, the number "8" refers to the underbust or band measurement, while the letter "G" indicates the volume of the cup. This size is especially suited to curvy & full-bust women who need structured support without compromising on comfort or style. It’s perfect for women who have a narrow rib cage and larger cup sizes, requiring tailored styles that cater to their body shape.
International Bra Size Chart
| Region | Size Equivalent |
|---|---|
| Australia | 8G |
| UK | 30F |
| US | 30I |
| EU | 65I |
| France | 80I |
How to Measure Your Bra Size
Getting the right bra size starts with a measuring tape and two simple steps:
- Band Size: Wrap the tape snugly around your ribcage, just under your bust. Ensure it's level all around. Round to the nearest whole number in centimetres. This is your band size.
- Bust Size: Measure around the fullest part of your bust, keeping the tape relaxed but secure.
Use these two numbers to find your cup size by subtracting your band from your bust measurement. Every inch (or ~2.5 cm) difference equals one cup size. For example, a 20cm difference is around a G cup. Please note, this calculation is based on the Australian sizing system—cup size measurements may vary slightly between AU, US, and UK sizing charts. Use our fitting guide for full details, or explore our Expert Bra-fitting service in-store for personalised customer service.
What Are Sister Sizes?
If 8G isn’t quite right, you might try one of its sister sizes. These sizes have the same cup volume but a different band fit. For 8G, common sister sizes include:
- 6H – Smaller band, same cup volume
- 10FF – Slightly wider band, same cup volume
This is helpful when your usual size feels a bit snug or loose, or if you experience variations in sizes across brands. Sister sizes ensure a consistent fit even with different styles and premium fabrics.
Best Bra Styles for 8G
Support, comfort, and confidence are key when you're shopping for an 8G bra. These bra styles are particularly well-suited for curvy women and those with larger cup sizes:
- Lightly Padded: Offers shape without bulk and gives a nice shape under clothing
- Wireless: Perfect for relaxed, all-day wear
- Seamless: Invisible under clothes and ultra-comfy
- Underwired Full Cup: Designed to fully encase the breast tissue, this style provides maximum lift, shaping, and secure coverage—ideal for fuller busts needing reliable support all day long.
- Sports Bra: Great for movement and active support
- Nursing Bras: Supportive during pregnancy and perfect fit during nursing months
Our bras often include thoughtful features like adjustable back strap, adjustable straps, and smart strap position engineering for total comfort.
Featured Brands Stocked in Size 8G
At The Foundation, we proudly stock 8G bras made with recycled fabric and soft handle simplex fabric by brands that specialise in fit, comfort, and sustainability. Explore collections from:
Empreinte and PrimaDonna are known for premium fabrics that offer outstanding breathability, durability, and a luxuriously soft feel against the skin—perfect for everyday comfort and long-lasting wear.
Use our size filters to narrow your search for coverage bra options or style for fashion purposes.
Your Fit. Your Foundation.
Whether you're after soft and supportive or sleek and sculpted, the right bra starts with the right size. Browse our full range of 8G bras and rediscover comfort and confidence every day. We also offer swimwear for size 8G – just another way we support your curves in every season.
FAQs
What does 8G mean in bra sizes?
It’s an Australian size combining a size 8 band (a small ribcage) with a G cup (full bust volume).
How do I know if I need a sister size?
If the cup fits but the band feels off, try a sister size like 6H or 10FF to get the exact size you need.
Do you have wireless bras in 8G?
Yes! We offer several wireless and lightly padded options for 8G, perfect for curvy women.
Can I return my 8G bra if it doesn’t fit?
Yes, provided it meets our return policy and is unworn with tags. Refer to our size chart if you're unsure of your usual bra size.
Which brand is best for 8G bras?
It depends on your needs, but brands like Empreinte and PrimaDonna are known for premium fabrics, superior fit, and elegant style designed for fit women of all shapes.