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.
You're on the list. We'll be in touch when your size launches.
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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