18K Bras

Bras in Size 18K, But Better

If you wear an 18K bra, you’ve likely spent years settling. Sister sizes. Awkward fits. Styles that tick some boxes, but never all of them. Then, when you finally find your size, the options are generally lacking in any personality or style. That’s why so many Australian women choose Rose & Thorne for their plus size bras. Our 18K bras are made to support heavier, denser busts while prioritising comfort and confidence.  The fit is firm yet flexible. The lift is subtle yet effective. And most importantly, they feel as good as they look.

Size 18K Bras Are Anything But Basic

Support at this level isn’t a bonus, it’s the baseline. Our 18K bras sit within our Premium Support, created specifically for women who expect more from their underwear. You’ll find a wide 3-hook underband for stability, generous straps that distribute weight comfortably, and our specialised ‘C’-shaped underwire to lift and centre without spill. A higher-cut cup offers extra coverage and a naturally supported shape - perfect for all-day wear, no matter what’s on your calendar. And thanks to our Forgiving Fit technology, you can count on a consistent feel, even if your size changes slightly over time.

How to Choose the Best 18K Bra

When it comes to size 18K, full cup styles are the most reliable choice. Look for depth in the cups, firm side support, and finishes that feel considered, from breathable linings to reinforced seams. Whether you prefer timeless tones or something with personality, our 18K collection has a wide range of options. Shop our elegant lace bras or multi-coloured bras that reflect your personality. And of course, we have plenty of staple everyday bras too. Browse the range now at Rose & Thorne.