20GG
Shop 20GG Bras – Premium Support for Fuller Busts
What is a 20GG Bra Size?
A 20GG bra features a wide band and a full cup. In Australian sizing, "20" refers to the band size – the measurement around your ribcage. "GG" indicates the cup size – which reflects the difference between your bust and band measurements. This size is ideal for those with a fuller bust and broader frame, offering strong support without compromising comfort.
Bra Size International Comparison Chart
| Region | Size Equivalent |
|---|---|
| Australia (AU) | 20GG |
| United Kingdom (UK) | 42GG |
| United States (US) | 42J |
| Europe (EU) | 95J |
| France (FR) | 110J |
How to Measure Yourself for a Bra
Using a tape measure, follow these steps to determine your correct bra size:
- Step 1 – Band size: Wrap the tape measure snugly around your ribcage, directly under your bust. Round up to the nearest even number.
- Step 2 – Bust size: Measure around the fullest part of your bust, keeping the tape relaxed but secure. The difference between your band and bust measurement determines your cup size.
Our sizing guide and expert bra-fitting service—both in-store and through our virtual bra fitting service—can help you find the perfect fit.
What If 20GG Isn’t Available?
Consider sister sizes that offer the same cup volume but different band fits. If you need a tighter band, try 18H. For a more relaxed fit, 22G may be suitable. Sister sizing is helpful when your preferred size is out of stock or if your body changes over time.
Top Bra Styles for 20GG
We offer a broad range of full cup and curvy bras designed to suit a variety of needs and preferences:
- Premium support bras: Engineered for all-day lift and comfort
- Wireless and C-shaped wire bras: Ideal for gentle, flexible support
- Full cup bras: Provide maximum coverage and minimise spillage
- Strapless bras: Perfect for special occasion wear without compromise
- Plus-size sports bras: Available in low, medium, and high impact options
- Maternity and nursing bras: Designed for comfort and support from the start
Trusted Brands Stocked in Size 20GG
- Elomi: Offers bold, supportive styles tailored for curvier figures
- Fantasie: Combines elegance and engineered support
Every piece is selected for quality, comfort, and expert fit by our experienced bra-fitters.
Why Choose The Foundation?
- Free Exchanges and 100-Day Returns on eligible items
- Exclusive special offers – sign up to be the first to know and receive $10 off your next purchase
- Friendly, knowledgeable Customer Service—online and in-store
- Super-soft materials, thoughtfully crafted for everyday wear
We recommend using a lingerie wash bag and gentle wash settings to protect your investment and keep your favourites fresh in your lingerie drawer.
Shop Now – Explore our full cup collection
FAQs About 20GG Bras
What’s the difference between 20GG and 42GG?
They are equivalent sizes. 20GG is the Australian size; 42GG is the UK size.
Do you offer plus-size sports bras?
Yes – we stock styles from Royce, Bendon and more for every activity level.
Can I access a virtual bra fitting?
Absolutely. Our virtual bra fitting service is available for convenient at-home consultations.
What bra styles are best for 20GG?
We recommend full cup, balcony, lightly padded, and seamless bras for optimal support and shape.
How should I care for my bras?
Hand wash or use a lingerie wash bag in a cold, gentle cycle. Avoid tumble drying.
Still need help? Visit one of our locations or speak with our D–K cup fit experts today.