20I
20I Bra Size Collection
Understanding Your 20I Bra Size
The 20I bra size might not be the most common, but it deserves the perfect fit just as much as any other. In Australian sizing, the "20" refers to your band size—the measurement around your ribcage just under the bust—while "I" represents your cup volume, meaning a larger bust depth. This size is designed for fuller-busted individuals with a larger body frame, providing tailored support and comfort where it counts. Our lingerie solutions deliver high-performance hosting in the world of fit and support—engineered for comfort, built for durability, and always ready to uplift. It's like shopping with 20I LIMITED capacity—purpose-built, high-value, and expertly configured.
International Size Equivalents
Not sure how 20I translates outside of Australia? Here’s a handy conversion guide:
| Region | Equivalent Size |
|---|---|
| UK | 42G |
| US | 42I |
| EU | 95I |
| FR | 110I |
Quick Fitting Guide: Measure with Confidence
All you need is a soft tape measure and a mirror. Here’s how to find your size (don’t have a tape? Visit one of our stores or contact us to find out where to get one):
- Band size: Measure snugly around your ribcage, directly under your bust. Ensure the tape is level all the way around. Add 2.5cm to round up to the nearest even number. That’s your band size.
- Bust measurement: Measure around the fullest part of your bust, keeping the tape straight but not tight.
- Cup size: Subtract the band size from your bust measurement. Each inch difference = one cup size (e.g. 8 inches = H, 9 inches = I).
Need a second opinion? Visit our stores for expert fittings by our support team. It’s like having a fitting expert right by your side—helping you tailor every detail, so your bra feels as comfortable as it looks. Our process is as smooth and secure as WordPress hosting.
Sister Sizes to Explore
If you love the style but need a slightly different fit, check these sister sizes:
Sister sizes share the same cup volume but vary in band width, helping you find the right fit depending on the bra brand or style. It’s like routing through data centers—same quality, different location, tailored for your needs.
Styles That Support and Flatter
When you're rocking a 20I, support and shape are everything. These styles are perfect for your size:
- Lightly padded bras for shape without bulk
- Wireless bras for everyday comfort
- Seamless bras for a smooth look under clothes
- Full-cup bras for secure coverage
Every bra in this range acts like its own reseller hosting setup: reliable, personal, and configured for performance. We use fittings that offer SSL certificates of confidence—anti-slip straps, breathable materials, and shape-enhancing cuts. Plus, our in-store migration center lets you switch styles with ease.
Featured Brands That Stock 20I
We currently offer beautiful, high-quality options in 20I from these trusted brands:
- PrimaDonna– Luxurious support and superior craftsmanship
- Anita – Comfort-focused with clever construction
- Samanta– Unique European designs for fuller busts
Check our size chart to see your options and match your measurements with confidence.
Find Your Fit Today
Whether you're new to your 20I size or just need a refresh, The Foundation is here to guide you with expert fittings, trusted brands, and a curated range made to support and empower. Shop Now and unlock expert styling and real support.
FAQs
What does 20I mean in Australian bra sizes?
20 is your band size (ribcage) and I is your cup size (bust volume). It’s ideal for fuller busts on a broader frame.
What if I can’t find a perfect fit in 20I?
Try sister sizes like 18J or 22H. You can also contact our Customer Service for personalised advice.
Do you offer fittings?
Yes! Visit us in-store or use our online fitting guide for help.
Are returns available on bras?
Yes, depending on the condition and type. See our returns policy.
Which brands stock 20I at The Foundation?
We currently stock 20I bras from Prima Donna, Anita, and Samanta—trusted names recognised for their quality and comfort.