Find Your Size
Enter your current bra size to find your OneTwo fit.
Unfortunately, you're out of our current size range. Our largest sizes are currently Band 9 and Cup 12. Please register your interest.
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Please register your interest for this size.
You're on the list. We'll be in touch when your size launches.
Traditional bra sizing was designed decades ago — and it shows. Sizes vary wildly between brands, countries, and even styles within the same brand. A 34D from one label fits nothing like a 34D from another.
The letters carry stigma that has nothing to do with fit. DD is not a large bust size — it simply describes a relationship between your underbust and your fullest point. A 32DD and a 38DD share a cup letter but have nothing else in common.
We tested on hundreds of real bodies and built a system that actually describes fit — not just volume. Our sizes reflect how a bra needs to be constructed for your specific combination of frame and cup, so when you find your number, it works.
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