About
Who runs this site, what it is for, and what it deliberately does not do.
Bra Size Guide is an independent Australian bra sizing tool. One calculator, a handful of guides that help you use it, and no accounts, no email capture and no stored measurements.
Why this exists
Bra sizing is unstandardised, badly explained and frequently embarrassing to ask about. Most calculators online ask for a size you already have, hide the arithmetic, or exist mainly to move you toward a shop. We wanted a version that shows its working, states its limits, and treats the result as a starting point rather than a verdict.
What we promise
- A plausible starting size from two measurements, in under two minutes.
- The exact arithmetic used, on the same screen as the result.
- Two sister sizes and a fit checklist, so you know what to do next.
- No account, no email, no measurement stored anywhere – not in a database, not in a URL, not in analytics.
- No advertising between you and your answer.
What we deliberately do not do
- No medical claims. Nothing here diagnoses anything or comments on breast health. If something concerns you physically, see a GP.
- No guarantee of fit. Brands vary too much for any calculator to promise a fit, and we will not pretend otherwise.
- No accounts or measurement history. There is nothing to log into.
- No scraped retailer data. Charts are read and recorded by a person, with dates.
- No pages built for search engines alone. See our editorial policy.
Expertise and review
The calculation method, measurement instructions and fit guidance are published transparently and are open to review by qualified or demonstrably experienced bra fitters. We name a reviewer only after a completed review and never manufacture credentials. The active method version is shown with every result and documented on the methodology page.
If you are an expert fitter and wish to review our fitting guidelines, please contact us and we can have a chat.
How this is funded
Advertising, placed around the experience rather than inside it. In future we may add carefully selected retail affiliate links, which will always be disclosed and marked. Commercial relationships have no influence on sizing guidance – see the affiliate disclosure and editorial policy.
Getting in touch
Corrections, questions and factual reports are welcome. We do not ask for and cannot help with your measurements by email – the calculator does that better and more privately.